1.
What are the building blocks of all organisms?
Correct Answer
D. Cells
Explanation
Cells are the building blocks of all organisms. They are the smallest unit of life and perform all the necessary functions for an organism to survive. Cells can exist as single-celled organisms or combine to form complex multicellular organisms. They are responsible for carrying out essential processes such as metabolism, growth, reproduction, and responding to stimuli. Without cells, organisms would not be able to function or exist.
2.
How many types of cells are in our bodies?
Correct Answer
B. 200
Explanation
There are approximately 200 different types of cells in our bodies. Each type of cell has a specific function and plays a vital role in maintaining the overall health and functioning of our body. These cells include red and white blood cells, nerve cells, muscle cells, skin cells, and many others. They work together to carry out various biological processes and ensure the proper functioning of our organs and systems.
3.
How many types of Nutrients are in food?
Correct Answer
A. 6
Explanation
There are six types of nutrients in food. These include carbohydrates, proteins, fats, vitamins, minerals, and water. These nutrients play various important roles in the body, such as providing energy, supporting growth and development, maintaining bodily functions, and preventing diseases.
4.
Which of the following is used as an energy source?
Correct Answer
D. Carbohydrates
Explanation
Carbohydrates are used as an energy source in the body. When consumed, they are broken down into glucose, which is then used by cells for energy production. Carbohydrates are the body's preferred source of energy and are essential for various bodily functions, including brain function and physical activity. Water, minerals, and vitamins are important for overall health and bodily functions, but they do not directly serve as energy sources like carbohydrates do.
5.
Which one of the following speeds up the rate of a chemical reaction in your body?
Correct Answer
E. Enzymes
Explanation
Enzymes are biological catalysts that speed up chemical reactions in the body by lowering the activation energy required for the reaction to occur. They do this by binding to the reactant molecules and facilitating the formation of new bonds or the breaking of existing bonds. Vitamins, carbohydrates, water, and lipids do not directly speed up chemical reactions in the body. While vitamins and water are essential for various metabolic processes, they do not have a direct catalytic effect on reactions. Carbohydrates and lipids are primarily used as energy sources rather than catalysts. Therefore, the correct answer is enzymes.
6.
Which of the following processes the food in our body?
Correct Answer
E. Digestive system
Explanation
The digestive system processes the food in our body. It is responsible for breaking down the food we eat into nutrients that can be absorbed and used by our body. This process involves the mechanical and chemical digestion of food in the mouth, stomach, and intestines. The nutrients are then absorbed into the bloodstream and transported to cells throughout the body to provide energy and support various bodily functions. The circulatory system, lymphatic system, urinary system, and endocrine system all have important roles in the body, but they do not directly process the food we consume.
7.
Which of the following is the main organ of the Digestive system?
Correct Answer
E. Stomach
Explanation
The stomach is the main organ of the digestive system. It plays a crucial role in breaking down food and aiding in digestion. It secretes digestive enzymes and acids that help to break down proteins and other nutrients. The stomach also helps to regulate the release of food into the small intestine for further digestion and absorption. Additionally, it has muscular contractions that mix and churn the food, further aiding in digestion. Overall, the stomach is an essential organ in the digestive system, responsible for the initial processing of food.
8.
Which one of the following is not an organ of the Digestive system?
Correct Answer
A. Spleen
Explanation
The spleen is not an organ of the digestive system. It is a part of the lymphatic system and is responsible for filtering blood, removing old or damaged red blood cells, and producing immune cells. The other options, such as the liver, ascending colon, rectum, and pancreas, are all organs that play a role in the digestion and absorption of food.
9.
Which type of digestion takes place when food is chewed, mixed, and churned?
Correct Answer
A. Mechanical
Explanation
Mechanical digestion refers to the physical breakdown of food into smaller pieces through actions like chewing, mixing, and churning. This process helps to increase the surface area of the food, making it easier for enzymes to break down the food further during chemical digestion. Therefore, the correct answer is Mechanical.
10.
When does chemical digestion occur?
Correct Answer
B. It occurs when chemical reactions occur that break down large molecules of food into smaller ones.
Explanation
Chemical digestion occurs when chemical reactions break down large molecules of food into smaller ones. This process involves enzymes breaking down complex carbohydrates into simple sugars, proteins into amino acids, and fats into fatty acids and glycerol. These smaller molecules can then be easily absorbed and used by the body for energy and other functions.
11.
The circulatory system is also known as:
Correct Answer
B. The cardiovascular system
Explanation
The cardiovascular system is the correct answer because it refers to the network of blood vessels, the heart, and the blood that circulates through the body. This system is responsible for transporting oxygen, nutrients, hormones, and waste products throughout the body, and plays a vital role in maintaining homeostasis and overall health. The other options mentioned, such as the pulmonary system, endocrine system, lymphatic system, and regulator system, are not accurate names for the circulatory system.
12.
What is the main organ of the Circulatory system?
Correct Answer
A. Heart
Explanation
The main organ of the circulatory system is the heart. It is responsible for pumping blood throughout the body, supplying oxygen and nutrients to the organs and tissues. The heart consists of four chambers that work together to ensure proper circulation. It receives deoxygenated blood from the body and sends it to the lungs to be oxygenated, then pumps the oxygenated blood back to the body. Without the heart, the circulatory system would not be able to function properly, and the body would not receive the necessary oxygen and nutrients.
13.
What types of blood vessels are there in our bodies?
Correct Answer
E. Arteries, capillaries, veins
Explanation
Our bodies contain three types of blood vessels: arteries, capillaries, and veins. Arteries carry oxygenated blood away from the heart to the rest of the body. Capillaries are tiny blood vessels where the exchange of oxygen, nutrients, and waste products occur between the blood and the body's tissues. Veins then carry deoxygenated blood back to the heart. Therefore, the correct answer is "Arteries, capillaries, veins."
14.
Which of the following has a function in carrying oxygen and carbon dioxide?
Correct Answer
A. Red blood cells
Explanation
Red blood cells have a function in carrying oxygen and carbon dioxide. They contain a protein called hemoglobin, which binds to oxygen in the lungs and carries it to the body's tissues. At the same time, red blood cells pick up carbon dioxide from the tissues and transport it back to the lungs to be exhaled. White blood cells are responsible for fighting infections, plasma is the liquid component of blood that carries nutrients and hormones, and platelets help in blood clotting. However, none of these components specifically carry oxygen and carbon dioxide like red blood cells do.
15.
What does carry nutrients and other substances in the blood?
Correct Answer
C. Plasma
Explanation
Plasma is the correct answer because it is the liquid component of blood that carries various substances, including nutrients, hormones, waste products, and antibodies. Red blood cells, white blood cells, and platelets are cellular components of blood and do not carry nutrients or substances in the same way that plasma does.
16.
What does occur when the coronary circulation is blocked?
Correct Answer
D. Oxygen and nutrients cannot reach all the cells.
Explanation
When the coronary circulation is blocked, it means that the blood flow to the heart muscle is restricted. This can occur due to the buildup of plaque in the coronary arteries, leading to a condition called coronary artery disease. When the circulation is blocked, oxygen and nutrients cannot reach all the cells in the heart muscle. This can result in chest pain or angina, and if the blockage is severe, it can cause a heart attack. Therefore, the correct answer is that oxygen and nutrients cannot reach all the cells.
17.
What is HYDROPERICARDIUM?
Correct Answer
A. Dropsy of the Pericardium
18.
Which body system brings oxygen into the body?
Correct Answer
D. Respiratory system
Explanation
The respiratory system is responsible for bringing oxygen into the body. It consists of organs such as the nose, trachea, and lungs, which work together to inhale oxygen from the air and transport it to the bloodstream. The oxygen is then delivered to the body's cells, where it is used for various metabolic processes. The respiratory system also helps to remove carbon dioxide, a waste product of cellular respiration, from the body through exhalation.
19.
Where does air start its journey?
Correct Answer
D. From the nose
Explanation
Air starts its journey from the nose. The nose acts as the main entry point for air into the respiratory system. When we inhale, air enters through the nostrils and passes through the nasal cavity. The nasal cavity is lined with tiny hairs called cilia and mucus-producing cells, which help to filter, warm, and moisten the air before it reaches the lungs. Therefore, the nose plays a crucial role in the initial stage of the air's journey into our body.
20.
What does the upper part of the trachea contain?
Correct Answer
A. The larynx
Explanation
The upper part of the trachea contains the larynx. The larynx, also known as the voice box, is a part of the respiratory system located at the top of the trachea. It plays a crucial role in producing sound and protecting the airway during swallowing, preventing food or liquid from entering the lungs. The larynx contains the vocal cords, which vibrate to produce sound when air passes through them.
21.
Where are the vocal cords found?
Correct Answer
A. At the opening of larynx
Explanation
The vocal cords are found at the opening of the larynx. The larynx is a part of the respiratory system located in the throat. It houses the vocal cords, which are responsible for producing sound when air passes through them. This is where the sound of our voice is generated. The other options, such as in the mouth or at the end of the trachea, are incorrect as they do not accurately describe the location of the vocal cords.
22.
Which of the following is the main organ of the Respiratory system?
Correct Answer
E. Lungs
Explanation
The main organ of the Respiratory system is the lungs. The lungs are responsible for the exchange of oxygen and carbon dioxide in the body. They receive oxygen from the air we breathe and transfer it to the bloodstream, while also removing carbon dioxide from the bloodstream and releasing it into the air when we exhale. The lungs are composed of millions of tiny air sacs called alveoli, which increase the surface area available for gas exchange. The other options listed, such as the pharynx, larynx, bronchi, are all important parts of the respiratory system but do not serve as the main organ.
23.
What is the name of microscopic air sacs which provide gas exchanges?
Correct Answer
E. Alveoli
Explanation
Alveoli are microscopic air sacs in the lungs that provide gas exchange. They are responsible for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream. Oxygen from the air enters the alveoli and diffuses into the bloodstream, while carbon dioxide produced by the body's cells diffuses out of the bloodstream and into the alveoli to be exhaled. The large surface area and thin walls of the alveoli allow for efficient gas exchange, making them essential for respiration.
24.
When do the waste gases leave the body?
Correct Answer
A. During exhalation
Explanation
During exhalation, waste gases such as carbon dioxide leave the body. This occurs when the diaphragm and intercostal muscles relax, causing the volume of the chest cavity to decrease. As a result, the pressure inside the lungs increases, forcing the waste gases out through the airways and out of the body.
25.
Which organ controls breathing?
Correct Answer
A. Brain
Explanation
The brain controls breathing. It sends signals to the muscles responsible for breathing, such as the diaphragm and intercostal muscles, to contract and relax, allowing air to enter and leave the lungs. The brain constantly monitors the levels of oxygen and carbon dioxide in the blood and adjusts the breathing rate and depth accordingly to maintain a balance. Without the brain's control, the body would not be able to regulate breathing properly.
26.
What is called the mechanics of breathing in and out?
Correct Answer
A. Ventilation
Explanation
Ventilation refers to the process of breathing in and out, which involves the movement of air in and out of the lungs. It includes both inhalation, which is the act of breathing in, and exhalation, which is the act of breathing out. Ventilation is essential for the exchange of oxygen and carbon dioxide in the respiratory system. This process is controlled by the contraction and relaxation of the diaphragm and other respiratory muscles.
27.
What does enlarge the chest cavity?
Correct Answer
B. DiapHragm
Explanation
The diaphragm is a dome-shaped muscle located at the base of the chest cavity. When it contracts, it moves downward, creating more space in the chest cavity. This action allows the lungs to expand and fill with air, resulting in inhalation. Therefore, the diaphragm is responsible for enlarging the chest cavity. The lungs, trachea, and stomach do not directly contribute to enlarging the chest cavity.
28.
What are the functions of the Lymphatic system?
Correct Answer
A. Immunity and collection of excess body fluid back to the blood stream.
Explanation
The lymphatic system is responsible for two main functions: immunity and the collection of excess body fluid back to the blood stream. The lymphatic system plays a crucial role in the body's immune response, helping to defend against infections and diseases. It also helps to maintain fluid balance in the body by collecting excess fluid from tissues and returning it to the bloodstream. This prevents the buildup of fluid and helps to prevent swelling and edema. The other options listed, such as controlling breathing, production of energy, and enabling muscle movement, are not functions of the lymphatic system.
29.
What are the organs of the Lymphatic system?
Correct Answer
A. Tonsils, thymus, spleen
Explanation
The organs of the lymphatic system are the tonsils, thymus, and spleen. These organs play important roles in the body's immune response and the production and maturation of white blood cells. The tonsils are located in the throat and help to filter out harmful substances. The thymus is responsible for the development and maturation of T-cells, which are crucial for the immune system. The spleen acts as a filter for blood, removing old or damaged red blood cells and producing white blood cells to fight infection.
30.
What is the main organ of the Lymphatic system?
Correct Answer
A. Spleen
Explanation
The spleen is the main organ of the lymphatic system. It is responsible for filtering and cleaning the blood, removing old or damaged red blood cells, and producing white blood cells that help fight infection. It also plays a role in storing and releasing blood cells and platelets when needed. The spleen is located in the upper left side of the abdomen and is an important part of the body's immune system.
31.
What is the other function of the Lymphatic system?
Correct Answer
A. To help circulatory system
Explanation
The lymphatic system plays a crucial role in supporting the circulatory system by aiding in the transportation of fluids, such as lymph, throughout the body. It helps to maintain fluid balance, remove waste products, and fight against infections. Additionally, the lymphatic system assists in the absorption and transportation of fats from the digestive system to the bloodstream. Therefore, it can be concluded that the other function of the lymphatic system, apart from transporting fats, is to help the circulatory system.
32.
What is the function of the Immune system?
Correct Answer
E. All of them
Explanation
The immune system has multiple functions, including body defense, fighting infections and cancer, and also fighting against the HIV virus. It is responsible for protecting the body from harmful pathogens, such as bacteria, viruses, and cancer cells. Additionally, the immune system plays a crucial role in recognizing and eliminating the HIV virus. Therefore, the correct answer is "All of them" as it encompasses all the mentioned functions of the immune system.
33.
Which body system removes most of the wastes in our blood?
Correct Answer
C. Urinary system
Explanation
The urinary system is responsible for removing most of the wastes in our blood. It includes the kidneys, which filter waste products and excess water from the blood to form urine. The urine is then transported through the ureters to the bladder, where it is stored until it is eliminated from the body through the urethra. The digestive system breaks down food and absorbs nutrients, the respiratory system exchanges gases, and the integumentary system protects the body, but they do not primarily remove wastes from the blood.
34.
What are the main organs of the system which removes most of the wastes in our blood?
Correct Answer
C. Kidneys
Explanation
The kidneys are the main organs responsible for removing most of the wastes in our blood. They filter the blood and remove waste products, excess water, and toxins, which are then excreted as urine. The kidneys play a vital role in maintaining the body's overall balance by regulating the levels of electrolytes, pH, and fluid volume. While other organs like the lungs, heart, and skin also contribute to waste removal, the kidneys are the primary organs dedicated to this function.
35.
Which of the following is the functioning unit of the kidney?
Correct Answer
A. NepHron
Explanation
The functioning unit of the kidney is called the nephron. It is responsible for filtering waste products from the blood, reabsorbing essential substances, and producing urine. The nephron consists of a glomerulus, which filters blood, and a tubule, which reabsorbs water and other important substances. The urine is then transported out of the kidney through the ureter. The hypothalamus is a part of the brain that regulates various bodily functions, while urine is the waste product produced by the kidneys. Therefore, the correct answer is nephron.
36.
What is the organ of the Integumentary system?
Correct Answer
B. Skin
Explanation
The correct answer is "Skin" because the integumentary system is primarily composed of the skin. The skin is the largest organ in the human body and serves as a protective barrier against external factors such as pathogens, UV radiation, and dehydration. It also regulates body temperature, produces vitamin D, and contains sensory receptors for touch, pressure, and pain. The other options listed (spleen, kidneys, salivary glands, and lungs) are not part of the integumentary system and have different functions in the body.
37.
Which of the following is the inner layer of skin?
Correct Answer
A. Dermis
Explanation
The correct answer is Dermis. The dermis is the inner layer of the skin, located beneath the epidermis. It is composed of connective tissue and contains blood vessels, nerves, hair follicles, and sweat glands. The dermis provides support and nourishment to the epidermis and plays a crucial role in regulating body temperature and protecting the body from external factors.
38.
Which pigment gives the skin its color?
Correct Answer
D. Melanin
Explanation
Melanin is the pigment that gives the skin its color. It is produced by cells called melanocytes, which are located in the epidermis. Melanin is responsible for determining the color of our hair, eyes, and skin. It helps protect the skin from harmful UV radiation by absorbing and scattering the UV rays. The amount and type of melanin in our skin determine our skin color, ranging from lighter to darker shades. Urochrome, Yellow Ochre, and Chrome Orange are not pigments that give color to the skin.
39.
Which vitamin does skin produce?
Correct Answer
C. Vitamin D
Explanation
The skin produces Vitamin D when it is exposed to sunlight. Vitamin D is important for maintaining healthy bones and teeth, as it helps the body absorb calcium. It also plays a role in supporting the immune system and promoting overall health. While other vitamins like Vitamin C and Vitamin A are important for skin health, they are not produced by the skin itself.
40.
Which system is included in Control systems except for the Nervous system?
Correct Answer
C. The Endocrine system
Explanation
The endocrine system is the correct answer because it is a system that regulates and controls various bodily functions through the release of hormones. It works in conjunction with the nervous system to maintain homeostasis in the body. The other options listed (lymphatic system, respiratory system, digestive system, and urinary system) are not control systems but rather systems that have different functions such as immune response, gas exchange, nutrient absorption, and waste elimination, respectively.
41.
Which endocrine organ releases the hormone which increases the heartbeats and blood glucose level?
Correct Answer
A. Adrenal
Explanation
The adrenal gland releases the hormone called adrenaline, which increases heart rate and blood glucose levels. Adrenaline is released in response to stress or danger, preparing the body for a fight or flight response. It increases heart rate to pump more blood to the muscles and raises blood glucose levels to provide energy for the body to respond to the stressful situation.
42.
What is the name of the disease which results from the absence of thyroid hormone during uterine life or infancy?
Correct Answer
C. Cretinism
Explanation
Cretinism is the correct answer because it is a disease that occurs when there is a lack of thyroid hormone during uterine life or infancy. This hormone is essential for the proper development of the brain and body. Without it, individuals with cretinism may experience stunted growth, intellectual disability, and physical deformities. AIDS, influenza, and micro-vascular cranial nerve palsy are unrelated to the absence of thyroid hormone during early life.
43.
What is CNS?
Correct Answer
A. Central Nervous system
Explanation
The correct answer is Central Nervous system. The CNS refers to the complex network of nerves and cells that transmit signals between the brain and spinal cord. It is responsible for coordinating and controlling the activities of the body, including movement, sensation, and cognitive functions. The CNS consists of the brain and spinal cord, while the peripheral nervous system includes the nerves that extend from the CNS to the rest of the body.
44.
The Peripheral Nervous system can be divided into two groups as:
Correct Answer
A. Somatic and Autonomic
Explanation
The Peripheral Nervous system can be divided into two groups: Somatic and Autonomic. The somatic nervous system controls voluntary movements and sensory information, while the autonomic nervous system regulates involuntary functions such as heart rate, digestion, and breathing. This division allows for the efficient control and coordination of different bodily functions.
45.
Which of the following is an involuntary part of the Nervous system?
Correct Answer
B. Autonomic Nervous system
Explanation
The autonomic nervous system is an involuntary part of the nervous system. It controls the automatic functions of the body such as heart rate, digestion, and breathing. Unlike the somatic nervous system, which controls voluntary movements, the autonomic nervous system operates without conscious control. The central nervous system consists of the brain and spinal cord, while the peripheral nervous system includes all the nerves that connect the central nervous system to the rest of the body. Therefore, the correct answer is the autonomic nervous system.
46.
What are the organs of CNS?
Correct Answer
D. Brain and Spinal Cord
Explanation
The central nervous system (CNS) consists of the brain and spinal cord. These two organs are responsible for receiving and processing information from the body, coordinating motor responses, and controlling bodily functions. Neurons, although an essential component of the CNS, are not organs themselves but rather the cells that make up the nervous system. Therefore, the correct answer is "Brain and Spinal Cord."
47.
Which of the following is the largest sense organ?
Correct Answer
D. Skin
Explanation
The skin is the largest sense organ in the human body. It covers the entire body and is responsible for the sense of touch. It contains numerous receptors that detect various sensations such as pressure, temperature, and pain. The skin also plays a vital role in protecting the internal organs and regulating body temperature. Unlike the eyes, ears, and tongue, which are specific sense organs, the skin is a sensory organ that covers the entire body surface.
48.
What is the name skeletal system which is located inside the body?
Correct Answer
A. Endoskeleton
Explanation
The correct answer is Endoskeleton. The endoskeleton is the skeletal system located inside the body. It provides support, protection, and enables movement for the body's internal organs and tissues. This type of skeleton is found in vertebrates, including humans, and is made up of bones and cartilage. It serves as a framework for the body and helps maintain its shape and structure.
49.
How many joints does a skeletal system have?
Correct Answer
A. 3
Explanation
A skeletal system consists of bones and joints. Joints are the points where two or more bones meet. The correct answer is 3 because the skeletal system typically has three types of joints: fibrous joints, cartilaginous joints, and synovial joints. Fibrous joints allow very little or no movement, cartilaginous joints allow limited movement, and synovial joints allow free movement. Therefore, the skeletal system has multiple joints, but the question is asking for the number of joint types, which is 3.
50.
Which joint can not move freely?
Correct Answer
B. Slightly movable joints
Explanation
Slightly movable joints, also known as amphiarthroses, allow for limited movement between bones. They are characterized by the presence of cartilage or fibrous tissue that connects the bones, restricting their movement to some extent. Examples of slightly movable joints include the joints between the vertebrae in the spine and the pubic symphysis. While these joints do allow for some degree of movement, they are not as freely movable as other types of joints such as synovial joints.