Fascinating Science Quiz For All Kids Who Love Science
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Science is the study of the world around us. Scientists learn about their subject by observing, describing, and experimenting. There are many subjects and branches of science. Some study outer space like astronomy. Other sciences study life (biology) or the earth (geology) or even matter and energy (physics).
This is a Fascinating Science Quiz for all kids who love science.
ALL THE BEST
Questions and Answers
- 1.
The energy required for active processes is obtained from:
- A.
ATP
- B.
DNA
- C.
Cilia
- D.
RNA
Correct Answer
A. ATPExplanation
ATP (adenosine triphosphate) is a molecule that stores and releases energy in cells. It is often referred to as the "energy currency" of the cell. ATP is produced during cellular respiration and is used to power various active processes in the cell, such as muscle contraction, active transport of molecules across cell membranes, and synthesis of macromolecules. Therefore, the energy required for active processes is obtained from ATP.Rate this question:
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- 2.
Movement of substances from high concentration to low concentration is called
- A.
Active transport
- B.
Passive transport
- C.
Facilitated Diffusion
- D.
Option 4
Correct Answer
B. Passive transportExplanation
Passive transport refers to the movement of substances from an area of high concentration to an area of low concentration without the use of energy. This process occurs spontaneously and does not require any external force or energy input. It includes simple diffusion, where molecules move directly through the cell membrane, and facilitated diffusion, where molecules are transported across the membrane with the help of specific protein channels. Unlike active transport, which requires energy expenditure, passive transport relies on the natural concentration gradient to drive the movement of substances.Rate this question:
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- 3.
Osmosis is the ___________of water
- A.
Filtration
- B.
Transport
- C.
Active
- D.
Diffusion
Correct Answer
B. TransportExplanation
Osmosis is a type of transport process in which water molecules move across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. It does not involve the movement of solute particles, only the movement of water. Therefore, the correct answer is "Transport."Rate this question:
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- 4.
There are ________ types of bone
- A.
1
- B.
2
- C.
4
- D.
3
Correct Answer
C. 4Explanation
The correct answer is 4 because there are four main types of bone: long bones, short bones, flat bones, and irregular bones. Long bones, like the femur and humerus, are longer than they are wide. Short bones, like the bones in the wrist and ankle, are roughly equal in length and width. Flat bones, like the skull and ribs, are thin and usually curved. Irregular bones, like the vertebrae and facial bones, have complex shapes and do not fit into the other three categories.Rate this question:
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- 5.
Which one of the following is not a part of the axial skeleton?
- A.
Scapula
- B.
Ribs
- C.
Sternum
- D.
Vertebra
Correct Answer
A. ScapulaExplanation
The scapula is not a part of the axial skeleton. The axial skeleton includes the skull, vertebral column, ribs, and sternum. The scapula, also known as the shoulder blade, is part of the appendicular skeleton, which includes the bones of the limbs and their attachments to the axial skeleton.Rate this question:
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- 6.
The longest bone in the body is the:
- A.
Tibia
- B.
Fibula
- C.
Femur
- D.
Humerus
Correct Answer
C. FemurExplanation
The femur is the longest bone in the body. It is located in the thigh and extends from the hip to the knee. The femur is responsible for supporting the weight of the body and allowing for movement in the lower extremities. Its length and strength make it the longest and strongest bone in the human body.Rate this question:
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- 7.
There are pairs of true ribs
- A.
14
- B.
12
- C.
7
- D.
2
Correct Answer
C. 7Explanation
There are seven pairs of true ribs in the human body. True ribs are the first seven pairs of ribs that are directly connected to the sternum (breastbone) by costal cartilage. The remaining five pairs of ribs are called false ribs, as they do not directly attach to the sternum.Rate this question:
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- 8.
The ________ bones form the cheek bone
- A.
Mandible
- B.
Frontal
- C.
Zygomatic
- D.
Nasal
- E.
Option 5
Correct Answer
A. MandibleExplanation
The mandible, also known as the jawbone, forms the lower part of the cheekbone. It is the largest and strongest bone in the face and plays a crucial role in chewing, speaking, and supporting the lower teeth. The frontal bone forms the forehead, the zygomatic bone forms the upper part of the cheekbone, and the nasal bones form the bridge of the nose.Rate this question:
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- 9.
The jellylike fluid behind the lens in the posterior chamber of the eye is the:
- A.
Aqueous humor
- B.
Vitreous humor
Correct Answer
B. Vitreous humorExplanation
The jellylike fluid behind the lens in the posterior chamber of the eye is called the vitreous humor. This clear, gel-like substance helps to maintain the shape of the eye and provides support to the retina and other structures within the eye. It also helps to transmit light to the retina, allowing for clear vision. The vitreous humor is composed mainly of water, collagen fibers, and other substances, and it is not replaced or replenished as frequently as other fluids in the body.Rate this question:
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- 10.
The receptors for night vision are the: a. Rods b
- A.
Rods
- B.
Cones
Correct Answer
A. RodsExplanation
Rods are the receptors responsible for night vision. They are highly sensitive to low levels of light and are mainly located in the peripheral areas of the retina. Rods are responsible for detecting motion and providing black and white vision in low light conditions. Cones, on the other hand, are responsible for color vision and are more concentrated in the central part of the retina. Therefore, the correct answer is rods.Rate this question:
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- 11.
The bones of the middle ear are collectively referred to as Ossicles
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The bones of the middle ear, including the malleus, incus, and stapes, are collectively referred to as ossicles. These tiny bones are crucial for transmitting sound vibrations from the eardrum to the inner ear. They amplify and transmit the sound waves, allowing us to hear. Therefore, the statement "The bones of the middle ear are collectively referred to as ossicles" is true.Rate this question:
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- 12.
Branch of science that studies the structure of the body.
- A.
Physiology
- B.
Homeostasis
- C.
Pathophysiology
- D.
Anatomy
Correct Answer
D. AnatomyExplanation
Anatomy is the branch of science that studies the structure of the body. It focuses on the identification and description of the different parts of the body, such as organs, tissues, and systems. This field of study is essential for understanding how the body is organized and how its various components work together to maintain normal functioning. By studying anatomy, scientists and healthcare professionals can gain insights into the body's structure and develop a deeper understanding of its functions and potential abnormalities.Rate this question:
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- 13.
Branch of science that describes how the body functions.
- A.
Physiology
- B.
Anatomy
- C.
Pathophysiology
- D.
Homeostasis
Correct Answer
A. pHysiologyExplanation
Physiology is the branch of science that studies how the body functions. It focuses on understanding the mechanisms and processes that occur within living organisms, including humans. Physiology explores various systems and functions of the body, such as the cardiovascular, respiratory, and nervous systems, to gain insights into how they work together to maintain homeostasis. This knowledge is crucial for understanding normal body functions and how they can be affected by diseases or external factors.Rate this question:
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- 14.
The main function of the cell wall is to:
- A.
Support and protect the cell
- B.
Store DNA
- C.
Help the cell move
- D.
Direct the activities of the cell
Correct Answer
A. Support and protect the cellExplanation
The cell wall is a rigid layer that surrounds the cell membrane in plant cells, bacteria, fungi, and some protists. Its main function is to provide support and protection to the cell. It helps maintain the shape of the cell and prevents it from bursting or collapsing under osmotic pressure. Additionally, the cell wall acts as a physical barrier, protecting the cell from mechanical damage and pathogens. Therefore, the correct answer is "Support and protect the cell."Rate this question:
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- 15.
The thin, flexible barrier around a cell is called the:
- A.
Cell wall
- B.
Nuclear envelope
- C.
Plasma membrane
- D.
Cytoplasm
Correct Answer
C. Plasma membraneExplanation
The plasma membrane is the correct answer because it is a thin, flexible barrier that surrounds the cell. It is made up of a phospholipid bilayer and proteins, which help regulate the movement of substances in and out of the cell. The plasma membrane is responsible for maintaining the cell's internal environment and protecting it from the external environment.Rate this question:
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- 16.
Which of the following is the function of the cytoskeleton?
- A.
Contains DNA
- B.
Surrounds the cell
- C.
Helps the cell keep its shape
- D.
Helps make protein
Correct Answer
C. Helps the cell keep its shapeExplanation
The cytoskeleton is a network of protein filaments within the cell that provides structural support and helps maintain the cell's shape. It acts like a scaffold, giving the cell its shape and allowing it to maintain its structural integrity. The cytoskeleton also plays a role in cell movement, cell division, and the transport of materials within the cell. It is not involved in containing DNA, surrounding the cell, or directly involved in protein synthesis.Rate this question:
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- 17.
Diffusion is the movement of particles from:
- A.
Diffusion is the movement of particles from:
- B.
An area of low concentration to an area of high concentration
- C.
An area of high concentration to an area of low concentration
Correct Answer
C. An area of high concentration to an area of low concentrationExplanation
Diffusion is the movement of particles from an area of high concentration to an area of low concentration. This is because particles tend to move from an area where they are more concentrated to an area where they are less concentrated in order to achieve a state of equilibrium.Rate this question:
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- 18.
Which of the following is the "powerhouse" of the cell that breaks down food into energy that the cell needs?
- A.
Vacuole
- B.
Endoplasmic reticulum
- C.
Mitochondria
- D.
Chloroplast
Correct Answer
C. MitochondriaExplanation
Mitochondria are often referred to as the "powerhouse" of the cell because they are responsible for breaking down food molecules and converting them into energy in the form of ATP (adenosine triphosphate). This process, known as cellular respiration, occurs within the mitochondria's inner membrane. Through a series of chemical reactions, the mitochondria extract energy from nutrients and produce ATP, which is used by the cell to carry out its various functions. Therefore, mitochondria play a crucial role in providing the energy that cells need to perform their activities.Rate this question:
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- 19.
Which of the following is the site for protein synthesis?
- A.
Cell membrane
- B.
Nucleus
- C.
Ribosomes
- D.
Lysosomes
Correct Answer
C. RibosomesExplanation
Ribosomes are the site for protein synthesis. They are small, spherical organelles found in the cytoplasm of a cell. Ribosomes are responsible for translating the genetic information from DNA into proteins. They do this by assembling amino acids in the correct order according to the instructions carried by messenger RNA (mRNA). Ribosomes can be found freely floating in the cytoplasm or attached to the endoplasmic reticulum. They play a crucial role in the production of proteins, which are essential for various cellular functions and processes.Rate this question:
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- 20.
Each organelle has a specified
- A.
Shape
- B.
Function
- C.
Size
- D.
Mass
Correct Answer
B. FunctionExplanation
Each organelle in a cell is responsible for carrying out specific functions. These functions can vary greatly depending on the organelle, such as energy production in the mitochondria or protein synthesis in the ribosomes. The shape, size, and mass of organelles may differ among cells and organisms, but the one common characteristic is their unique functions. Therefore, the correct answer is "Function."Rate this question:
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- 21.
Which list below correctly shows the levels of organization in an organism from left to right?
- A.
Organ- tissue- system-cell-organism
- B.
Cell- tissue- organ- system- organism
- C.
Cell- tissue- organ- organism- system
- D.
Tissue-cell- organ- organism- system
Correct Answer
B. Cell- tissue- organ- system- organismExplanation
The correct answer is cell- tissue- organ- system- organism. This is because the levels of organization in an organism start with cells, which are the basic building blocks. Cells then come together to form tissues, which are groups of similar cells working together. Tissues then combine to form organs, which are structures made up of different types of tissues that work together to perform specific functions. Organs then work together in systems, which are groups of organs that work together to perform a larger function. Finally, all the systems in an organism work together to form the complete organism.Rate this question:
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- 22.
What type of tissue covers, lines, protects, secretes, and absorbs?
- A.
Epithelium
- B.
Connective
- C.
Muscle
- D.
Nervous
Correct Answer
A. EpitheliumExplanation
Epithelium is a type of tissue that covers and lines the surfaces of organs, protects underlying tissues, secretes various substances, and absorbs nutrients. It forms the outer layer of the skin and lines the internal organs, blood vessels, and cavities. Epithelial cells are tightly packed together and often have specialized structures like cilia or microvilli to aid in absorption and secretion. Therefore, epithelium is the correct answer to the question.Rate this question:
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- 23.
Which of the following is a shape of epithelial tissue?
- A.
Triangial
- B.
Rectangial
- C.
Squamous
- D.
Circular
Correct Answer
C. SquamousExplanation
Squamous is the correct answer because it refers to a shape of epithelial tissue. Epithelial tissue is a type of tissue that covers the surfaces of organs, lines body cavities, and forms glands. Squamous epithelial cells are flat and thin, resembling scales or tiles. They are found in places where diffusion or filtration occurs, such as the lining of blood vessels, air sacs in the lungs, and the outer layer of the skin. Triangial, rectangial, and circular are not recognized shapes of epithelial tissue.Rate this question:
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- 24.
What is the free surface of epithelium called?
- A.
Basal
- B.
Oregano
- C.
Apical
- D.
Cloves
Correct Answer
C. ApicalExplanation
The free surface of epithelium is called the apical surface. This surface is usually exposed to the external environment or to a body cavity and is involved in functions such as absorption, secretion, and protection. The apical surface may have various specialized structures, such as microvilli or cilia, depending on the specific function of the epithelial tissue.Rate this question:
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- 25.
Avascular means?
- A.
NO blood supply
- B.
Good blood supply
- C.
Good nerve supply
- D.
NO nerve supply
Correct Answer
A. NO blood supplyExplanation
Avascular means that there is no blood supply to a particular area or tissue. This can occur in certain parts of the body where blood vessels are absent or have been damaged. Without a blood supply, the tissue or area cannot receive the necessary oxygen and nutrients needed for proper functioning, leading to potential cell death or dysfunction.Rate this question:
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- 26.
Epithelial cell that secretes mucus?
- A.
Apical cell
- B.
Basal cell
- C.
Spiderman cell
- D.
Goblet cell
Correct Answer
D. Goblet cellExplanation
A goblet cell is an epithelial cell that secretes mucus. Mucus is a slimy substance that helps protect and lubricate the surfaces of the body. Goblet cells are found in various tissues, including the respiratory and digestive tracts. They have a unique shape, resembling a goblet or wine glass, with a wide base and a narrow opening at the top. This shape allows them to store and release mucus efficiently. The secretion of mucus by goblet cells is important for maintaining the health and functioning of the body's tissues.Rate this question:
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- 27.
Hair-like projections that move things along
- A.
Microvilli
- B.
Cilia
- C.
Flagellum
- D.
Seaweed on a rock
Correct Answer
B. CiliaExplanation
Cilia are hair-like projections that are found on the surface of certain cells. They are responsible for moving substances along the surface of the cell or moving the entire cell itself. Unlike microvilli, which are involved in absorption, and flagella, which are involved in cell movement, cilia specifically function in moving things along. Therefore, the correct answer is cilia.Rate this question:
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- 28.
Finger-like projections that absorb
- A.
Microvilli
- B.
Cilia
- C.
Flagellum
- D.
Houses
Correct Answer
A. MicrovilliExplanation
Microvilli are finger-like projections found on the surface of certain cells, such as those lining the small intestine. They greatly increase the surface area of the cell, allowing for more efficient absorption of nutrients. Microvilli are involved in the absorption of substances from the surrounding environment and play a crucial role in processes like digestion and nutrient uptake. Therefore, the correct answer is microvilli.Rate this question:
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- 29.
Which fiber is for strength?
- A.
Collagen
- B.
Reticular
- C.
Elastic
Correct Answer
A. CollagenExplanation
Collagen is the correct answer because it is a type of protein that provides strength and structure to various tissues in the body, including the skin, tendons, and ligaments. It forms a strong, flexible matrix that helps maintain the integrity and resilience of these tissues. Reticular fibers provide support and framework for organs, while elastic fibers allow tissues to stretch and recoil. However, when considering fiber specifically for strength, collagen is the most appropriate choice.Rate this question:
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- 30.
Which fiber is for stretching?
- A.
Reticular
- B.
Collagen
- C.
Elastic
Correct Answer
C. ElasticExplanation
Elastic fibers are responsible for stretching. Unlike collagen fibers, which provide strength and support, elastic fibers are able to stretch and recoil, allowing tissues to return to their original shape after being stretched or compressed. Reticular fibers, on the other hand, provide a supportive framework for organs and tissues. Therefore, the correct answer is elastic.Rate this question:
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- 31.
Tissue used for insulation, protection and energy storage.
- A.
Areolar
- B.
Dense fibrous
- C.
Adipose
- D.
Cartilage
Correct Answer
C. AdiposeExplanation
Adipose tissue is the correct answer because it is primarily used for insulation, protection, and energy storage. Adipose tissue is made up of fat cells that store excess energy in the form of triglycerides. It acts as an insulating layer beneath the skin, helping to regulate body temperature. It also provides cushioning and protection to organs and tissues. Adipose tissue is found throughout the body, including under the skin, around internal organs, and in bone marrow.Rate this question:
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- 32.
Mature cartilage cells
- A.
Chondrocytes
- B.
Osteocytes
- C.
Fibroblasts
- D.
Adipocytes
Correct Answer
A. ChondrocytesExplanation
Chondrocytes are the correct answer because they are mature cartilage cells. Chondrocytes are responsible for maintaining and repairing the cartilage matrix. They produce and maintain the extracellular matrix of cartilage, which consists of collagen fibers, proteoglycans, and water. Chondrocytes are found in the lacunae within the cartilage matrix and are responsible for the synthesis and turnover of the cartilage components.Rate this question:
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- 33.
liquid connective tissue
- A.
Mucus
- B.
Serous fluid
- C.
Blood
- D.
Water
Correct Answer
C. BloodExplanation
Blood is considered a liquid connective tissue because it is composed of cells suspended in a fluid matrix called plasma. It functions as a transportation system, carrying oxygen, nutrients, hormones, and waste products throughout the body. Additionally, blood plays a crucial role in regulating body temperature, maintaining pH balance, and defending against infections. The presence of red and white blood cells, along with platelets, further supports its classification as a connective tissue.Rate this question:
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- 34.
What defines a tight junction?
- A.
Made up of CAMs and proteoglycans (glycocalyx)
- B.
Form a channel by joining membrane & channel proteins from adjacent cells
- C.
Allows the least amount of passage.
- D.
None of the above.
Correct Answer
C. Allows the least amount of passage.Explanation
A tight junction is a specialized junction between cells that forms a barrier to prevent the passage of molecules and ions between cells. It is made up of integral membrane proteins that join together the plasma membranes of adjacent cells, effectively sealing the space between them. This tight seal restricts the movement of substances, allowing only the least amount of passage between cells. The other options mentioned, such as CAMs and proteoglycans, are not specific to tight junctions and do not define their characteristics.Rate this question:
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- 35.
What defines a gap junction?
- A.
Allows the least amount of passage
- B.
Made up of CAMs and proteoglycans
- C.
Form a channel by joining membrane and channel proteins
- D.
None of the above
Correct Answer
C. Form a channel by joining membrane and channel proteinsExplanation
A gap junction is defined by its ability to form a channel by joining membrane and channel proteins. This allows for the direct exchange of ions and small molecules between adjacent cells, facilitating communication and coordination between cells. The other options, allowing the least amount of passage and being made up of CAMs and proteoglycans, do not accurately describe the defining characteristic of a gap junction.Rate this question:
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- 36.
Which of the following is NOT a secretory product?
- A.
Mucous
- B.
Serous
- C.
Water
- D.
Mucous and Serous (Mixed)
Correct Answer
C. WaterExplanation
Water is not a secretory product because it is not produced by secretory cells or glands. Secretory products are substances that are synthesized and released by cells or glands for specific functions. Mucous and serous are examples of secretory products as they are produced and released by specific cells or glands in the body. However, water is not synthesized or released by secretory cells or glands, but rather it is a universal solvent that is found in the body and plays a crucial role in various physiological processes.Rate this question:
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- 37.
Which are the two divisions of Connective Tissue Proper?
- A.
Dense Connective Tissue & Fluid Connective Tissue
- B.
Loose Connective Tissue & Dense Connective Tissue
- C.
Fluid Connective Tissue & Supporting/Structural Connective Tissue
- D.
None of the above
Correct Answer
B. Loose Connective Tissue & Dense Connective TissueExplanation
Connective tissue proper is divided into two types: loose connective tissue and dense connective tissue. Loose connective tissue is characterized by loosely arranged collagen fibers and a gel-like ground substance. It provides support and flexibility to organs and holds them in place. Dense connective tissue, on the other hand, has densely packed collagen fibers and provides strength and resistance to stretching. It forms tendons, ligaments, and the dermis of the skin. The other options, fluid connective tissue and supporting/structural connective tissue, do not accurately represent the divisions of connective tissue proper.Rate this question:
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- 38.
Which of the following are part of fluid connective tissue?
- A.
Lymph
- B.
Sweat
- C.
Blood
- D.
Both blood & lymph
Correct Answer
D. Both blood & lympHExplanation
Both blood and lymph are part of the fluid connective tissue. Blood is a type of fluid connective tissue that consists of plasma, red blood cells, white blood cells, and platelets. It circulates throughout the body, transporting oxygen, nutrients, hormones, and waste products. Lymph, on the other hand, is a clear fluid that is derived from blood plasma and is part of the lymphatic system. It plays a crucial role in immune function by carrying lymphocytes and other immune cells to fight against infections and diseases. Therefore, both blood and lymph are considered as fluid connective tissues.Rate this question:
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- 39.
What is Lymph?
- A.
Specialized cells
- B.
Matrix
- C.
Interstitial fluid returning to vascular system
- D.
Plasma
Correct Answer
C. Interstitial fluid returning to vascular systemExplanation
Lymph is the interstitial fluid that returns to the vascular system. It is formed when plasma, the liquid component of blood, filters out of the capillaries and into the surrounding tissues. This fluid then collects waste materials, pathogens, and other substances before being transported back into the bloodstream through lymphatic vessels. Lymph also contains specialized cells, such as lymphocytes, which play a crucial role in the immune response. Therefore, the correct answer is "Interstitial fluid returning to vascular system."Rate this question:
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- 40.
Which of the following are types of cartilage?
- A.
Elastic
- B.
Hylin
- C.
Fibrocartilage
- D.
Bone
Correct Answer(s)
A. Elastic
B. Hylin
C. FibrocartilageExplanation
Elastic cartilage, hyaline cartilage, and fibrocartilage are all types of cartilage. Cartilage is a flexible connective tissue that provides support and structure to various parts of the body. Elastic cartilage is found in the external ear and epiglottis, providing flexibility and shape. Hyaline cartilage is the most common type, found in the nose, trachea, and the ends of long bones, providing support and cushioning. Fibrocartilage is found in the intervertebral discs and the knee joint, providing strength and shock absorption. Bone, on the other hand, is a different type of tissue that is not classified as cartilage.Rate this question:
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- 41.
Which of the following is the outermost layer of the epidermis?
- A.
Stratum spinosum
- B.
Stratum corneum
- C.
Stratum granulosum
- D.
Stratum basale
Correct Answer
B. Stratum corneumExplanation
The outermost layer of the epidermis is called the stratum corneum. This layer is composed of dead skin cells that have become flattened and filled with keratin, a tough protein. The stratum corneum acts as a protective barrier for the underlying layers of the epidermis and helps to prevent water loss and protect against external irritants and pathogens.Rate this question:
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- 42.
Which of the following is the deepest layer of the epidermis?
- A.
Stratum spinosum
- B.
Stratum corneum
- C.
Stratum granulosum
- D.
Stratum basale
Correct Answer
D. Stratum basaleExplanation
The stratum basale is the deepest layer of the epidermis. It is responsible for the continuous production of new skin cells, which then move up to the upper layers of the epidermis. This layer contains basal cells that divide and differentiate into keratinocytes, the main cells of the epidermis. The stratum basale also contains melanocytes, which produce the pigment melanin that gives color to the skin and protects it from harmful UV radiation.Rate this question:
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- 43.
Sebaceous glands secrete _______.
- A.
Sebum
- B.
Mpetigo
- C.
Sirius
- D.
Serous
Correct Answer
A. SebumExplanation
Sebaceous glands are responsible for secreting sebum. Sebum is an oily substance that helps to lubricate and moisturize the skin and hair. It also helps to protect the skin from drying out and acts as a barrier against bacteria and other pathogens. Therefore, the correct answer is Sebum.Rate this question:
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- 44.
Which of the following is most important in determining skin coloration?
- A.
Melanin
- B.
Keratin
- C.
Collegen
- D.
Hemoglobin
Correct Answer
A. MelaninExplanation
Melanin is the pigment responsible for determining skin coloration. It is produced by specialized cells called melanocytes, which are located in the epidermis. The amount and type of melanin produced by these cells determine an individual's skin color. Melanin absorbs ultraviolet (UV) radiation from the sun, protecting the skin from its harmful effects. Different levels of melanin production result in variations in skin color, ranging from lighter to darker shades. Therefore, melanin is the most important factor in determining skin coloration.Rate this question:
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- 45.
Which of the following is NOT a function of the skin?
- A.
Protection
- B.
Excretion
- C.
Respiratory gas exchange
- D.
Regulation of body temperature
Correct Answer
C. Respiratory gas exchangeExplanation
The skin is not involved in respiratory gas exchange. This function is primarily performed by the lungs. The skin's main functions include protection from external factors, excretion of sweat and waste products, and regulation of body temperature through sweating and blood vessel constriction or dilation.Rate this question:
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- 46.
The part of the hair that is visible is the
- A.
Root
- B.
Follicle
- C.
Cortex
- D.
Shaft
Correct Answer
D. ShaftExplanation
The visible part of the hair is called the shaft. The shaft is the portion of the hair that extends above the surface of the skin. It is composed of dead cells that have been pushed up from the hair follicle. The shaft is what we see and can touch when we look at or feel our hair. The root, follicle, and cortex are all important parts of the hair, but they are not visible to the naked eye.Rate this question:
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- 47.
What is the name of the pigment in the skin?
- A.
Chlorophyll
- B.
Melatonin
- C.
Melanin
- D.
Thyroxine
Correct Answer
C. MelaninExplanation
Melanin is the pigment responsible for determining the color of our skin. It is produced by special cells called melanocytes, which are located in the epidermis of the skin. The amount and type of melanin produced by these cells determine the various shades of skin color that exist among different individuals. Melanin also plays a crucial role in protecting the skin from the harmful effects of UV radiation by absorbing and dissipating the energy.Rate this question:
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- 48.
Ceruminous Glands found in________
- A.
Middle ear
- B.
Internal ear
- C.
External ear
- D.
Eye
Correct Answer
C. External earExplanation
Ceruminous glands are found in the external ear. These glands are responsible for producing earwax, also known as cerumen, which helps to protect and lubricate the ear canal. The presence of ceruminous glands in the external ear helps to prevent dust, dirt, and other foreign particles from entering the ear and potentially causing damage or infection.Rate this question:
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- 49.
In which layer of epidermis cell divison occurs:
- A.
Stratum Spinosum
- B.
Stratum Corneum
- C.
Stratum Germinative
- D.
Stratum Lucidum
Correct Answer
C. Stratum GerminativeExplanation
The correct answer is Stratum Germinative. This layer of the epidermis is also known as the basal layer and is responsible for cell division. It is located at the bottom of the epidermis and contains stem cells that continuously divide and differentiate into new skin cells. These new cells then move up through the other layers of the epidermis, eventually reaching the surface and replacing old, dead skin cells.Rate this question:
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- 50.
How many bones does the adult human body have?
- A.
210
- B.
206
- C.
110
- D.
106
Correct Answer
B. 206Explanation
The adult human body has 206 bones. This is the correct answer because the skeletal system of an adult human consists of 206 individual bones, which provide support, protection, and allow for movement. These bones include the skull, spine, ribs, pelvis, and the bones of the arms and legs.Rate this question:
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Mar 21, 2023Quiz Edited by
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