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Free Practice Quiz Question List

4 The Muscular System Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 The Muscular System, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A person slowly lowers a cup while keeping control of its downward movement. What type of contraction does the active muscle perform?

  1. A

    Concentric contraction

  2. B

    Eccentric contraction

  3. C

    Isometric contraction

02
True or false
1 point

True or false: During skeletal muscle contraction, actin and myosin filaments significantly shorten to make the sarcomere shorter.

  1. A

    True

  2. B

    False

03
Written response
1 point

What is the name of the cell membrane of a muscle fiber?

04
Fill in the blank
1 point

Within a skeletal muscle, a is a bundle of muscle fibers.

05
Choose all
1 point

Select all muscle types that are involuntary.

  1. A

    Skeletal muscle

  2. B

    Smooth muscle

  3. C

    Skeletal and smooth muscle only

  4. D

    Cardiac muscle

06
Choose one
1 point

An electrical impulse reaches the surface of a skeletal muscle fiber and must travel inward to trigger calcium release. Which structure carries the impulse into the fiber?

  1. A

    Sarcomeres

  2. B

    Intercalated discs

  3. C

    T-tubules

  4. D

    Tendons

07
True or false
1 point

True or false: ATP is needed both for myosin cross-bridge cycling and for calcium reuptake into the sarcoplasmic reticulum.

  1. A

    True

  2. B

    False

08
Written response
1 point

When bending the elbow to lift an object, what is the role of the muscle that produces the movement, such as the biceps brachii?

09
Fill in the blank
1 point

In smooth muscle, calcium binds to , which activates enzymes that enable myosin to interact with actin.

10
Choose all
1 point

Select all examples of an isometric contraction.

  1. A

    Holding a cup still

  2. B

    Lifting a cup

  3. C

    Maintaining tension while keeping a joint position unchanged

  4. D

    Lowering a cup under control

11
Choose one
1 point

In skeletal muscle, calcium binds to troponin. What change then enables myosin to bind to actin?

  1. A

    Troponin blocks myosin-binding sites on actin

  2. B

    Troponin shifts tropomyosin to expose myosin-binding sites on actin

  3. C

    Tropomyosin binds calcium and pulls myosin away from actin

  4. D

    Calcium breaks down actin to expose myosin-binding sites

12
Open ended
1 point

A person lifts a cup, lowers it under control, and then holds it still. Explain how the active muscle's length changes in each action and identify the contraction type for each.

13
Choose one
1 point

Which statement best distinguishes the regulation of smooth muscle contraction from skeletal muscle contraction?

  1. A

    Smooth muscle contracts without actin and myosin

  2. B

    Smooth muscle uses troponin to expose myosin-binding sites

  3. C

    Smooth muscle uses calcium-bound calmodulin to activate enzymes that enable myosin to interact with actin

  4. D

    Smooth muscle contraction is always under voluntary control

14
True or false
1 point

True or false: Skeletal muscles move bones by pushing them away from the muscle.

  1. A

    True

  2. B

    False

15
Choose one
1 point

In skeletal muscle organization, what is a fascicle?

  1. A

    A bundle of myofibrils

  2. B

    A bundle of muscle fibers

  3. C

    A single sarcomere

  4. D

    A covering around the whole muscle

16
Choose one
1 point

A person holds a cup still without raising or lowering it. Which type of contraction best describes the active muscle producing tension while its length stays approximately the same?

  1. A

    Concentric contraction

  2. B

    Eccentric contraction

  3. C

    Isometric contraction

  4. D

    Relaxation

17
Written response
1 point

What type of contraction occurs when an active muscle lengthens while resisting a load?

18
Choose one
1 point

When bending the elbow to lift an object, which description best identifies the roles of the biceps brachii and triceps brachii?

  1. A

    The biceps brachii is an agonist, and the triceps brachii is an antagonist.

  2. B

    The triceps brachii is an agonist, and the biceps brachii is an antagonist.

  3. C

    Both muscles are fixators because neither contributes to elbow movement.

  4. D

    Both muscles are synergists producing the same opposing movement.

19
Choose one
1 point

What happens to the thin and thick filaments as a skeletal muscle sarcomere shortens during contraction?

  1. A

    Actin and myosin filaments both significantly shorten.

  2. B

    Actin filaments slide past myosin filaments, and neither significantly shortens.

  3. C

    Myosin filaments slide past actin filaments, and both significantly shorten.

  4. D

    Actin filaments leave the sarcomere as myosin filaments contract.

20
Written response
1 point

Which neurotransmitter does a motor neuron release at the neuromuscular junction to excite a skeletal muscle fiber?