01
Choose one
1 point
A muscle in a blood vessel changes the vessel's diameter. Which type of muscle tissue performs this function?
Free Practice Quiz Question List
05 The Muscular System Online Quiz Questions
Use this free practice quiz with 20 questions to review 05 The Muscular System, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
After a muscle fiber receives an electrical signal, which event allows myosin to attach to actin?
- A
ATP exposes binding sites on myosin so actin can pull it.
- B
Acetylcholine directly shortens the actin filaments.
- C
Calcium exposes binding sites on actin so myosin can attach and pull.
- D
The motor neuron pulls the actin and myosin filaments past one another.
03
Choose one
1 point
A researcher identifies one motor neuron and the muscle fibers it activates. What has the researcher identified?
- A
A motor neuron and the muscle fibers it activates form a motor unit.
- B
A motor unit is a group of tendons attached to one joint.
- C
A motor unit is a set of sarcomeres that share one actin filament.
- D
A motor unit is a muscle and the bone it moves.
04
Choose one
1 point
When a skeletal muscle contracts to move a joint, how does its force reach the bone?
- A
A contracting muscle pushes the bone away from the joint.
- B
The tendon sends a nervous-system signal that moves the joint.
- C
The muscle's force passes through its tendon to pull on a bone across a joint.
- D
The bone shortens and pulls the muscle toward the joint.
05
Choose all
1 point
Select all statements that correctly describe muscle tissue types.
- A
Skeletal muscle is mostly voluntary and helps move the skeleton.
- B
Cardiac muscle is voluntary and is usually attached to bones by tendons.
- C
Cardiac muscle contracts rhythmically to pump blood.
- D
Smooth muscle can adjust the diameter of passageways.
- E
Smooth muscle has visible striations like skeletal muscle.
06
Choose all
1 point
A person is walking and adjusting their movement to stay balanced. Select all statements that correctly describe how body systems support this activity.
- A
Receptors in muscles, tendons, and joints provide information about stretch, tension, or body position.
- B
The nervous system can use sensory feedback to adjust activity for smoother movement.
- C
The skeletal system sends motor-neuron commands to muscle fibers.
- D
The cardiovascular and respiratory systems support increased muscle energy demands.
- E
A single body system produces walking without support from the others.
07
True or false
1 point
During skeletal muscle contraction, actin and myosin filaments slide past each other, but the filaments themselves do not shorten.
- A
True
- B
False
08
True or false
1 point
The somatic nervous system controls skeletal muscle as well as cardiac and smooth muscle.
- A
True
- B
False
09
Written response
1 point
What chemical messenger does a motor neuron release at the neuromuscular junction to trigger an electrical signal in a muscle fiber?
10
Written response
1 point
What is the name of a repeating unit within a skeletal muscle fiber that contains thin actin and thick myosin filaments?
11
Fill in the blank
1 point
During skeletal muscle contraction, calcium exposes on actin, and myosin uses energy from to repeat its pull-and-release cycle.
12
Fill in the blank
1 point
Most skeletal muscles attach to bones through . Because bones meet at , a muscle's pull can move a bone.
13
Open ended
1 point
Explain how a muscle can produce force without visibly shortening. Use holding a heavy bag still as an example, and contrast that action with lifting the bag.
14
True or false
1 point
True or false: A muscle can produce force while remaining nearly the same length.
- A
True
- B
False
15
Written response
1 point
A skeletal muscle contracts and transmits force to a bone. What structure usually carries that force from the muscle to the bone?
16
Choose one
1 point
A muscle in a blood vessel wall changes the vessel's diameter without conscious control. Which function best describes this muscle's role?
- A
It moves the skeleton voluntarily by pulling on bones.
- B
It adjusts passageway diameter in places such as blood vessels.
- C
It contracts rhythmically to pump blood from the heart.
- D
It stabilizes joints by connecting bones to one another.
17
Choose one
1 point
Which muscle tissue is best suited to pump blood through repeated, coordinated contractions that do not require conscious control?
- A
Skeletal muscle, because its cells are voluntarily controlled.
- B
Smooth muscle, because it moves substances through hollow organs.
- C
Cardiac muscle, because its electrically connected cells contract rhythmically.
- D
Skeletal muscle, because it is attached to the heart by tendons.
18
Choose one
1 point
During skeletal muscle contraction, what happens within a sarcomere to make it shorten?
- A
Myosin pulls actin inward, and the filaments slide past one another.
- B
Actin and myosin filaments both shorten to reduce the fiber's length.
- C
Actin pulls myosin outward, lengthening the sarcomere.
- D
The filaments remain still while the sarcomere shortens through compression.
19
Written response
1 point
A motor neuron and all the muscle fibers it activates are considered one what?
20
Choose one
1 point
When someone bends the elbow to lift a cup, the biceps brachii is the prime mover. What role does the triceps brachii, which straightens the elbow, play in this action?
- A
The triceps brachii is the synergist because it assists elbow bending.
- B
The triceps brachii is the antagonist because it straightens the elbow.
- C
The triceps brachii is the fixator because it bends the elbow.
- D
The triceps brachii is the prime mover because it lifts the cup.