Muscle Tissue - Skeletal Muscle Structures
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Types of muscle tissue
Skeletal Muscle
- 1.
How many types of muscle tissue are there?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
C. 3Explanation
There are three types of muscle tissue: skeletal muscle, which is responsible for voluntary movements; smooth muscle, which is found in the walls of organs and blood vessels and controls involuntary movements; and cardiac muscle, which is found in the heart and is responsible for its contraction.Rate this question:
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- 2.
The types of muscle tissue are (alphabetical order, leave spaces)
Correct Answer
cardiac skeletal smoothExplanation
Cardiac Muscle Tissue
Skeletal Muscle Tissue
Smooth Muscle TissueRate this question:
- 3.
What are the different functions of skeletal muscle tissue? (/6)
- 4.
The skeletal muscle contains has
- A.
Smooth tissue
- B.
Muscle tissue
- C.
Skeletal matter
- D.
Direct or indirect attachments to skeleton
- E.
Blood vessels
- F.
Nonstriated muscle
- G.
Connective tissue
- H.
Nerves
Correct Answer(s)
B. Muscle tissue
D. Direct or indirect attachments to skeleton
E. Blood vessels
G. Connective tissue
H. NervesExplanation
The skeletal muscle contains muscle tissue, which is responsible for the contraction and movement of the muscle. It also has direct or indirect attachments to the skeleton, allowing for movement and stability. Blood vessels are present in the skeletal muscle to provide oxygen and nutrients to the muscle fibers. Connective tissue surrounds and supports the muscle fibers, helping to transmit force and protect the muscle. Nerves are also present in the skeletal muscle, allowing for communication between the muscle and the central nervous system.Rate this question:
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- 5.
What is a muscle fiber?
- A.
A group of muscle cells specialized for contractions
- B.
A single muscle cell
- C.
A single skeletal muscle cell
- D.
A single adult muscle cell
Correct Answer
C. A single skeletal muscle cellExplanation
A muscle fiber refers to a single skeletal muscle cell. It is a specialized cell responsible for contraction and movement in the body. Muscle fibers contain proteins called actin and myosin, which slide past each other to generate force and enable muscle contractions. These contractions allow us to perform various physical activities such as walking, running, and lifting objects.Rate this question:
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- 6.
What are the types of connective tissue found in a muscle?
- A.
Deep Fascia
- B.
Endomysium
- C.
Perimysium
- D.
Collagen
- E.
Epimysium
- F.
Aponeurosis
- G.
Tendon
Correct Answer(s)
B. Endomysium
C. Perimysium
E. EpimysiumExplanation
The types of connective tissue found in a muscle are endomysium, perimysium, and epimysium. Endomysium is a delicate connective tissue that surrounds individual muscle fibers. Perimysium is a thicker connective tissue that surrounds bundles of muscle fibers called fascicles. Epimysium is a dense connective tissue that surrounds the entire muscle. These connective tissues provide support, protection, and organization to the muscle fibers, allowing them to work together efficiently during muscle contraction.Rate this question:
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- 7.
The epimysium is a dense layer of _ fibers
Correct Answer(s)
collagenExplanation
The epimysium is a dense layer of collagen fibers. Collagen is a strong and flexible protein that provides structural support and helps to maintain the shape and integrity of tissues. In the case of the epimysium, collagen fibers form a dense layer around the entire muscle, providing protection and support. These collagen fibers help to connect the muscle to other structures and contribute to the overall strength and stability of the muscle.Rate this question:
- 8.
The epimysium is connected to the deep fascia.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The epimysium is a layer of connective tissue that surrounds the entire muscle. It is continuous with the deep fascia, which is a layer of connective tissue that surrounds muscles, bones, and other structures. This connection between the epimysium and deep fascia allows for the transmission of forces generated by muscle contractions and provides support and protection to the muscle. Therefore, the statement that the epimysium is connected to the deep fascia is true.Rate this question:
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- 9.
The perimysium divides skeletal muscle into _.
Correct Answer
fasciclesExplanation
The perimysium is a connective tissue that surrounds and separates bundles of muscle fibers called fascicles. These fascicles are organized within the skeletal muscle and are responsible for generating force and movement. The perimysium acts as a protective barrier and provides structural support to the fascicles, allowing them to function efficiently. Therefore, the correct answer is fascicles.Rate this question:
- 10.
Muscle Fibers are
- A.
Short
- B.
Circular
- C.
Long
- D.
Cylindrical
- E.
Nonstriated
- F.
Striated
- G.
Multinucleate
- H.
Spindle-shaped
Correct Answer(s)
C. Long
D. Cylindrical
F. Striated
G. MultinucleateExplanation
Muscle fibers are:
- long
- cylindrical
- striated
- multinucleateRate this question:
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- 11.
Identify A. (3 word answer)
Correct Answer(s)
Skeletal Muscle Tissue - 12.
What is B?
- A.
Cardiac Muscle Tissue
- B.
Skeletal Muscle Tissue
- C.
Muscle Fiber
- D.
Cardiocyte
- E.
Smooth Muscle Tissue
Correct Answer
A. Cardiac Muscle TissueExplanation
Cardiac muscle tissue is the correct answer because it is the specialized muscle tissue found in the heart. It is responsible for the contraction and relaxation of the heart, allowing it to pump blood throughout the body. Cardiac muscle tissue is unique in its structure and function, with interconnected cells that allow for coordinated contractions. This tissue is involuntary, meaning it contracts without conscious control.Rate this question:
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- 13.
Cardiac muscle cells are
- A.
Short
- B.
Long
- C.
Branched
- D.
Unbranched
- E.
Striated
- F.
Nonstriated
- G.
Multinucleate
- H.
Isolated
- I.
Interconnected
- J.
Spindle-shaped
- K.
Cylindrical
Correct Answer(s)
A. Short
C. Branched
E. Striated
I. InterconnectedExplanation
Cardiac muscle cells are short, branched, striated, and interconnected. Cardiac muscle cells are shorter compared to skeletal muscle cells and have a branching pattern that allows them to connect with neighboring cells. They also have striations, which are alternating light and dark bands, due to the arrangement of contractile proteins. The interconnections between cardiac muscle cells allow for coordinated contraction and efficient pumping of blood.Rate this question:
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- 14.
Smooth muscle cells have several nuclei
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Single, central nucleusRate this question:
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- 15.
Smooth muscle tissue has cells that are
- A.
Circular
- B.
Spindle-shaped
- C.
Cylindrical
- D.
Striated
- E.
Nonstriated
- F.
Branched
- G.
Multinucleate
- H.
Long
- I.
Short
Correct Answer(s)
B. Spindle-shaped
E. Nonstriated
I. ShortExplanation
Smooth muscle tissue is composed of cells that are spindle-shaped and nonstriated. These cells have a tapered ends and a central nucleus, giving them a spindle-like appearance. Unlike striated muscle tissue, smooth muscle tissue does not have visible striations or bands. Smooth muscle cells are also shorter in length compared to skeletal muscle cells.Rate this question:
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- 16.
How do skeletal muscle fibers differ from a "typical" cell? (2)
- 17.
What is the name for the cell membrane of a muscle fiber?
Correct Answer(s)
sarcolemmaExplanation
SarcolemmaRate this question:
- 18.
What is the sarcoplasm?
- A.
Cytoplasm of cardiocyte
- B.
Cytoplasm of skeletal muscle cell
- C.
Cell membrane of a smooth muscle cell
- D.
Cytoplasm of a muscle cell
- E.
Nucleus of a muscle cell
Correct Answer
B. Cytoplasm of skeletal muscle cellExplanation
The sarcoplasm refers to the cytoplasm of a skeletal muscle cell. Skeletal muscle cells are responsible for voluntary movement in the body. The sarcoplasm contains various organelles and structures necessary for muscle contraction, such as myofibrils, mitochondria, and glycogen stores. It also contains the sarcoplasmic reticulum, which stores and releases calcium ions, an essential component in muscle contraction. Therefore, the correct answer is "cytoplasm of skeletal muscle cell."Rate this question:
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- 19.
What are the narrow tubes that are continuous with lemma, and extend into sarcoplasm?
- A.
Myofibrils
- B.
Transverse tubules
- C.
Sarcoplasmic reticulum
- D.
Terminal cisterna
Correct Answer
B. Transverse tubulesExplanation
Transverse tubules are narrow tubes that are continuous with the lemma and extend into the sarcoplasm. They are an important part of muscle cells, specifically skeletal muscle cells, as they allow for the rapid transmission of action potentials deep into the muscle fiber. This allows for synchronized muscle contraction. The transverse tubules are in close proximity to the sarcoplasmic reticulum, which is responsible for storing and releasing calcium ions necessary for muscle contraction.Rate this question:
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- 20.
Broad sheet formed when collagen from skeletal muscle's connective tissue join together is called:
Correct Answer
aponeurosisExplanation
An aponeurosis is a broad sheet of connective tissue that forms when collagen fibers from the skeletal muscle's connective tissue join together. It serves as a strong attachment point for muscles and helps distribute the force generated by muscle contractions. This structure provides stability and support to the muscles, allowing them to function effectively.Rate this question:
- 21.
A __________ is a bundle of collagen at the end of a muscle fiber from the epimysium, perimysium and endomysium.
Correct Answer
tendonExplanation
A tendon is a fibrous connective tissue that connects muscle to bone. It is composed of collagen fibers that extend from the muscle fibers, through the epimysium (outer layer of connective tissue surrounding the entire muscle), perimysium (connective tissue surrounding bundles of muscle fibers), and endomysium (connective tissue surrounding individual muscle fibers). Tendons provide stability and transmit the force generated by the muscle to the bone, allowing movement and locomotion.Rate this question:
- 22.
Perimysium has
- A.
Collagen
- B.
Elastic fiber
- C.
Connective tissue
- D.
Epimysium
- E.
Cardiocytes
- F.
Blood vessels
- G.
Nerves
- H.
Fascicles
Correct Answer(s)
A. Collagen
B. Elastic fiber
F. Blood vessels
G. Nerves
H. FasciclesExplanation
Perimysium is a connective tissue that surrounds and supports individual muscle fibers within a muscle. It is composed of collagen, which provides strength and stability to the muscle. Additionally, perimysium contains elastic fibers that allow the muscle to stretch and recoil. Blood vessels and nerves also run through the perimysium, supplying oxygen and nutrients to the muscle fibers and allowing for communication between the muscle and the nervous system. Fascicles, which are bundles of muscle fibers, are also found within the perimysium.Rate this question:
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- 23.
Which connective tissue in the skeletal muscle has myosatellite cells?
- A.
Endomysium
- B.
Epimysium
- C.
Perimysium
- D.
Myosatellite cells are not found in skeletal muscle
Correct Answer
A. EndomysiumExplanation
The endomysium is the connective tissue that surrounds individual muscle fibers within the skeletal muscle. It contains myosatellite cells, which are responsible for muscle repair and regeneration. These cells are important for maintaining the overall health and function of the skeletal muscle.Rate this question:
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- 24.
Myosatellite cells are receptors on muscle fibers.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
They are embryonic stem cells used to repair.Rate this question:
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- 25.
The collagen fibers from perimysium and epimysium are interwoven and blend together.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The collagen fibers from PERIMYSIUM and ENDOMYSIUM are interwoven and blend together.Rate this question:
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- 26.
The smallest subunit of skeletal muscle system is:
- A.
Myofibril
- B.
Muscle tissue
- C.
Muscle fiber
- D.
Myofilament
- E.
Mitochondrion
- F.
Nucleus
- G.
Sarcolemma
Correct Answer
D. MyofilamentExplanation
A myofilament is the smallest subunit of the skeletal muscle system. It refers to the individual protein filaments, specifically actin and myosin, that make up the structure of muscle fibers. These myofilaments are responsible for the contraction and relaxation of muscles, allowing for movement. The other options listed, such as muscle tissue, muscle fiber, and sarcolemma, are larger components of the skeletal muscle system that consist of multiple myofilaments. Therefore, myofilament is the most accurate and specific answer choice.Rate this question:
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- 27.
Order the following from smallest to largest: 1. muscle tissue 2. muscle fiber 3. myofilament 4. myofibril
- A.
1,2,3,4
- B.
3,2,1,4
- C.
4,3,2,1
- D.
2,1,3,4
- E.
3,4,2,1
Correct Answer
E. 3,4,2,1Explanation
Smallest to Largest:
Myofilament --> Myofibril --> Muscle Fiber ---> Muscle TissueRate this question:
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- 28.
Which structure is responsible for transmitting the signal for the entire muscle fiber to contract?
- A.
T-tubules (transverse tubules)
- B.
Sarcoplasm
- C.
Sarcomere
- D.
Sarcolemma
- E.
Epimysium
- F.
Sarcoplasmic reticulum
- G.
Terminal cisternae
Correct Answer
A. T-tubules (transverse tubules)Explanation
T-tubules, also known as transverse tubules, are responsible for transmitting the signal for the entire muscle fiber to contract. These tubular structures are located at regular intervals along the muscle fiber and are in close proximity to the sarcoplasmic reticulum. When an action potential is generated, it travels along the T-tubules, allowing the release of calcium ions from the sarcoplasmic reticulum. The calcium ions then initiate the contraction of the muscle fiber by interacting with the proteins within the sarcomeres. Therefore, T-tubules play a crucial role in the excitation-contraction coupling process of muscle contraction.Rate this question:
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- 29.
Which structure of the myofibril stores calcium ions?
- A.
Terminal cisternae
- B.
T-tubules
- C.
Sarcoplasmic reticulum
- D.
Mitochrondria
- E.
Nucleus
Correct Answer
A. Terminal cisternaeExplanation
The terminal cisternae is a structure within the myofibril that stores calcium ions. Calcium ions are essential for muscle contraction, and the terminal cisternae acts as a reservoir for these ions. When a muscle is stimulated to contract, calcium ions are released from the terminal cisternae into the muscle fibers, allowing the actin and myosin filaments to interact and generate force. Therefore, the terminal cisternae plays a crucial role in the regulation of muscle contraction by controlling the availability of calcium ions.Rate this question:
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- 30.
What is the triad composed of?
- A.
T-tubule
- B.
Terminal cisternae
- C.
Sarcoplasmic reticulum
- D.
Sarcolemma
- E.
Myofibril
- F.
None of the above
Correct Answer(s)
A. T-tubule
B. Terminal cisternaeExplanation
2 terminal cisternae on either side of 1 T-tubule = triadRate this question:
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- 31.
What is the function of T-tubules (transverse tubules)?
- 32.
Which of the following is true?
- A.
T-tubules conduct signal for muscle fiber to contract
- B.
T-tubules project out from sarcolemma
- C.
T-tubules carry nutrients for ATP synthesis
- D.
T-tubules are not found in the skeletal system.
Correct Answer
A. T-tubules conduct signal for muscle fiber to contractExplanation
T-tubules conduct signal for muscle fiber to contract (action potential)
T-tubules extend into sarcoplasm (perpendicular to cell surface)Rate this question:
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- 33.
Transverse tubules are filled with extracellular fluid
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Transverse tubules, also known as T-tubules, are invaginations of the sarcolemma (muscle cell membrane) that penetrate deep into the muscle fiber. These tubules are filled with extracellular fluid, which allows for the rapid transmission of electrical impulses throughout the muscle fiber. This is essential for coordinating muscle contractions and ensuring efficient muscle function. Therefore, the statement that transverse tubules are filled with extracellular fluid is true.Rate this question:
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- 34.
A __ is the same length as the entire muscle fiber.
Correct Answer
myofibrilExplanation
A myofibril is a structure within a muscle fiber that runs the entire length of the fiber. It is responsible for muscle contraction and is composed of smaller units called sarcomeres. The myofibril is the functional unit of the muscle fiber and is the same length as the entire muscle fiber itself. This allows for coordinated muscle contractions and efficient muscle function.Rate this question:
- 35.
_ are the bundles of protein filaments in myofibrils
Correct Answer
MyofilamentsExplanation
Myofilaments are the bundles of protein filaments in myofibrils. They are responsible for the contraction of muscle fibers. These filaments consist of two types: thick filaments made of myosin protein and thin filaments made of actin protein. The interaction between these filaments, specifically the sliding of thin filaments over thick filaments, leads to muscle contraction. Therefore, myofilaments play a crucial role in the functioning of muscles.Rate this question:
- 36.
What are the three filaments part of the myofibril? Say one thing about each of them.
- A.
Thick filaments
- B.
Thin filaments
- C.
Titin
- D.
Elastin
- E.
Collagen
- F.
Aponeurosis
Correct Answer(s)
A. Thick filaments
B. Thin filaments
C. TitinExplanation
Thick filaments - made mainly of myosin
Thin filaments - made mainly of actin
Titin - elastic + associated with the thick filamentsRate this question:
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- 37.
Which structure is mainly responsible for the muscle contractions of a muscle fiber?
- A.
T-tubules
- B.
Myofibril
- C.
Sarcolemma
- D.
Sarcoplasm
- E.
Myofilaments
Correct Answer
B. MyofibrilExplanation
Actively shorten --> contraction -> Entire cell shortens -> pull on tendonRate this question:
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- 38.
Outer surface of sarcolemma is attached to the collagen fibers of the tendon/aponeurosis
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the outer surface of the sarcolemma, which is the plasma membrane of a muscle fiber, is indeed attached to the collagen fibers of the tendon or aponeurosis. This attachment allows for the transmission of force generated by the muscle contraction to the tendon or aponeurosis, which in turn transfers the force to the bone, resulting in movement.Rate this question:
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- 39.
At the end of each muscle fiber, what is anchored to the inner surface of the sarcolemma?
- A.
Myofibrils
- B.
T-tubules
- C.
Terminal cisternae
- D.
Sarcoplasmic reticulum
Correct Answer
A. MyofibrilsExplanation
Myofibrils are anchored to the inner surface of the sarcolemma. The sarcolemma is the cell membrane of a muscle fiber, and myofibrils are long, cylindrical structures that make up the majority of the muscle fiber's volume. They contain the contractile proteins actin and myosin, which are responsible for muscle contraction. By being anchored to the sarcolemma, myofibrils are able to transmit the force generated during muscle contraction to the surrounding tissue.Rate this question:
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- 40.
The structure related to the smooth endoplasmic reticulum is:
Correct Answer
sarcoplasmic reticulumExplanation
The smooth endoplasmic reticulum is a network of membrane-bound tubules and sacs found in eukaryotic cells. It is involved in various functions such as lipid synthesis, detoxification, and calcium storage. The sarcoplasmic reticulum, on the other hand, is a specialized type of smooth endoplasmic reticulum found in muscle cells. It plays a crucial role in regulating calcium levels, which is essential for muscle contraction and relaxation. Therefore, the sarcoplasmic reticulum is a specific example of the smooth endoplasmic reticulum that is found in muscle cells.Rate this question:
- 41.
What forms a tubular network around each myofibril?
- A.
Sarcoplasmic reticulum
- B.
Sarcoplasm
- C.
Nucleus
- D.
Triad
- E.
Terminal cisternae
Correct Answer
A. Sarcoplasmic reticulumExplanation
The sarcoplasmic reticulum forms a tubular network around each myofibril. It is a specialized type of endoplasmic reticulum found in muscle cells. Its main function is to store and release calcium ions, which are essential for muscle contraction. The tubular structure of the sarcoplasmic reticulum allows for efficient communication and coordination between different parts of the myofibril, ensuring proper muscle function.Rate this question:
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- 42.
Which statements are correct?
- A.
T-tubule is bound to SR membranes
- B.
SR is related to rough endoplasmic reticulum
- C.
Terminal cisternae are enlarged, fused SR tubules
- D.
Terminal cisternae are expanded chambers
- E.
Terminal cisternae hold acetylcholine.
- F.
Triad consists of terminal cisternae and a T-tubule
- G.
Triad has membranes that are tightly bound together, so has a homogeneous fluid
Correct Answer(s)
A. T-tubule is bound to SR membranes
C. Terminal cisternae are enlarged, fused SR tubules
D. Terminal cisternae are expanded chambers
F. Triad consists of terminal cisternae and a T-tubuleExplanation
SR is related to SER
terminal cisternae hold calcium ions
fluid contents of triad are separate and distinct (but membranes of diff. components bound together)Rate this question:
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- 43.
Special ion pumps keep extracellular concentration of Ca2+ ions low.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
keep INTRAcellular concentration low.Rate this question:
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Mar 22, 2023Quiz Edited by
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Nov 02, 2011Quiz Created by
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