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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

Food is propelled through the digestive tract without conscious control. Which type of muscle tissue produces this movement?

  1. A

    Skeletal muscle in the thigh moves the leg voluntarily.

  2. B

    Smooth muscle in the digestive tract moves food involuntarily.

  3. C

    Cardiac muscle in the heart moves the limbs involuntarily.

  4. D

    Skeletal muscle in the arm regulates blood-vessel diameter.

02
True or false
1 point

When someone slowly lowers a weight, the active muscle lengthens while controlling the load. This is an eccentric contraction.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

Moving an arm away from the body's midline is called .

04
Written response
1 point

Which shoulder muscle is identified as raising the arm?

05
Choose one
1 point

At the neuromuscular junction, which chemical messenger does a motor neuron release to signal a skeletal muscle fiber?

  1. A

    Calcium

  2. B

    ATP

  3. C

    Acetylcholine

  4. D

    Myosin

06
Choose all
1 point

Select all statements that correctly describe muscle tissue types.

  1. A

    Cardiac muscle is striated and contracts involuntarily.

  2. B

    Smooth muscle is striated and usually under voluntary control.

  3. C

    Skeletal muscle is generally striated and under voluntary control.

  4. D

    Cardiac muscle is nonstriated and usually under voluntary control.

  5. E

    Smooth muscle is nonstriated and contracts involuntarily.

07
Written response
1 point

What is the name of the repeating basic contractile unit found within a myofibril?

08
Fill in the blank
1 point

Straightening the elbow, which usually increases the angle between the bones, is called .

09
Choose one
1 point

For a typical skeletal muscle crossing a joint, which statement best describes the origin and insertion?

  1. A

    The insertion is always the stable attachment, and the origin always moves.

  2. B

    The origin is often more stable, and the insertion is often more movable.

  3. C

    Both attachments are tendons that connect one muscle to another.

  4. D

    The origin and insertion are names for the two ends of a sarcomere.

10
True or false
1 point

A muscle's connective-tissue layers continue into tendons that attach the muscle to bone.

  1. A

    True

  2. B

    False

11
Choose all
1 point

A person is standing still and making no obvious limb movements. Select all roles muscles can still perform in this situation.

  1. A

    Maintaining posture

  2. B

    Producing red blood cells

  3. C

    Stabilizing joints

  4. D

    Generating heat

  5. E

    Filtering waste from the blood

12
Open ended
1 point

Explain how a signal from a motor neuron leads to force production in a skeletal muscle fiber. Include the roles of acetylcholine, calcium, actin, myosin, and ATP, and explain what changes in the sarcomere.

13
Choose one
1 point

A movement requires a stronger force from a skeletal muscle. Which change would generally increase the muscle's force output?

  1. A

    Recruit fewer motor units.

  2. B

    Reduce the frequency of stimulation.

  3. C

    Recruit more motor units.

  4. D

    Make the actin and myosin filaments shorter.

14
Choose one
1 point

Which type of muscle tissue contracts involuntarily to move food through the digestive tract?

  1. A

    Cardiac muscle contracts voluntarily to move food through the digestive tract.

  2. B

    Smooth muscle contracts involuntarily to move food through the digestive tract.

  3. C

    Skeletal muscle contracts involuntarily to move food through the digestive tract.

  4. D

    Smooth muscle contracts voluntarily to regulate the heartbeat.

15
Written response
1 point

Which lower-leg muscle lifts the foot upward?

16
Choose one
1 point

A person holds a weight motionless in one position. Which type of contraction describes the muscle activity when the muscle develops tension without noticeably changing length?

  1. A

    Concentric contraction

  2. B

    Eccentric contraction

  3. C

    Isometric contraction

  4. D

    Relaxation

17
True or false
1 point

During skeletal muscle contraction, actin and myosin filaments slide past one another, and the filaments themselves become shorter.

  1. A

    True

  2. B

    False

18
Choose one
1 point

A person slowly lowers a weight, and the active muscle lengthens while resisting the load. Which type of contraction is occurring?

  1. A

    Eccentric contraction

  2. B

    Concentric contraction

  3. C

    Isometric contraction

  4. D

    Relaxation

19
Written response
1 point

What chemical messenger does a motor neuron release at the neuromuscular junction to signal a skeletal muscle fiber?

20
Choose one
1 point

A whole muscle needs to produce more force. Which change would generally increase its force, according to the role of motor units?

  1. A

    Recruit fewer motor units.

  2. B

    Reduce the frequency of stimulation.

  3. C

    Recruit more motor units.

  4. D

    Shorten the actin filaments.