Muscle structure

Question 1

What is the basic functional unit of muscle tissue?

Answer 1

The sarcomere.

Question 2

True or False: Skeletal muscle is involuntary.

Answer 2

False.

Question 3

Fill in the blank: The _____ is a connective tissue that surrounds a muscle.

Answer 3

epimysium.

Question 4

What type of muscle is responsible for voluntary movements?

Answer 4

Skeletal muscle.

Question 5

Which muscle type is found in the walls of hollow organs?

Answer 5

Smooth muscle.

Question 6

What is the primary function of cardiac muscle?

Answer 6

To pump blood throughout the body.

Question 7

Which protein is primarily responsible for muscle contraction?

Answer 7

Actin and myosin.

Question 8

Multiple choice: Which muscle type has striations?

Answer 8

Skeletal muscle.

Question 9

True or False: Cardiac muscle is under voluntary control.

Answer 9

False.

Question 10

What is the term for the muscle’s ability to respond to stimuli?

Answer 10

Excitability.

Question 11

Fill in the blank: The _____ is a membrane that covers individual muscle fibers.

Answer 11

endomysium.

Question 12

What is the role of the sarcoplasmic reticulum in muscle cells?

Answer 12

To store and release calcium ions.

Question 13

Which part of the muscle is connected to bones by tendons?

Answer 13

The belly of the muscle.

Question 14

True or False: Smooth muscle can be found in the heart.

Answer 14

False.

Question 15

What is the term for the attachment point of a muscle that remains fixed during contraction?

Answer 15

Origin.

Question 16

What is the primary energy source for muscle contractions?

Answer 16

Adenosine triphosphate (ATP).

Question 17

Fill in the blank: The _____ is a connective tissue that surrounds fascicles.

Answer 17

perimysium.

Question 18

Multiple choice: Which muscle type is non-striated?

Answer 18

Smooth muscle.

Question 19

What is the term for the ability of a muscle to stretch?

Answer 19

Extensibility.

Question 20

True or False: All muscle types are capable of regeneration.

Answer 20

False.

Question 21

What is the role of myoglobin in muscle cells?

Answer 21

To store oxygen.

Question 22

Fill in the blank: The _____ is the functional contractile unit of a muscle fiber.

Answer 22

sarcomere.

Question 23

What type of muscle tissue is found in the heart?

Answer 23

Cardiac muscle.

Question 24

True or False: Muscle fibers can only contract in one direction.

Answer 24

True.

Question 25

What is the term for a muscle that opposes the action of another muscle?

Answer 25

Antagonist.

Question 26

Fill in the blank: Muscles that work together to produce a movement are known as _____ muscles.

Answer 26

synergistic.

Question 27

What is the primary role of tendons?

Answer 27

To connect muscles to bones.

Question 28

What is the term for the muscle's ability to shorten and thicken?

Answer 28

Contractility.

Question 29

Multiple choice: What is the main function of the muscle spindle?

Answer 29

To detect changes in muscle length.

Question 30

True or False: The diaphragm is a skeletal muscle.

Answer 30

True.

Question 31

What is the name of the muscle that raises the arm?

Answer 31

Deltoid.

Question 32

Fill in the blank: The _____ is a sheath of connective tissue that surrounds the entire muscle.

Answer 32

epimysium.

Question 33

What is the term for the point of attachment of a muscle that moves during contraction?

Answer 33

Insertion.

Question 34

What is the primary role of the Z-line in a sarcomere?

Answer 34

To define the boundaries of each sarcomere.

Question 35

True or False: Muscle fibers are multinucleated.

Answer 35

True.

Question 36

What type of contraction generates force without changing length?

Answer 36

Isometric contraction.

Question 37

Fill in the blank: The _____ is the smallest unit of contraction in a muscle.

Answer 37

sarcomere.

Question 38

Which muscle is primarily responsible for flexing the forearm?

Answer 38

Biceps brachii.

Question 39

Multiple choice: Which type of muscle contraction occurs when the muscle lengthens?

Answer 39

Eccentric contraction.

Question 40

What is the term for the connective tissue that surrounds an entire muscle group?

Answer 40

Fascia.

Question 41

True or False: Muscle contractions require calcium ions.

Answer 41

True.

Question 42

Fill in the blank: The _____ is the part of the muscle that is responsible for the muscle's action.

Answer 42

belly.

Question 43

What is the primary role of the actin filament in muscle contraction?

Answer 43

To provide a site for myosin to bind and pull.

Question 44

What is the role of the neuromuscular junction?

Answer 44

To transmit signals from nerves to muscles.

Question 45

True or False: All muscles in the body are under conscious control.

Answer 45

False.

Question 46

What is the function of the troponin complex in muscle contraction?

Answer 46

To regulate the interaction between actin and myosin.

Question 47

Fill in the blank: The _____ is the main substance that muscles utilize for energy during contraction.

Answer 47

ATP.