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1. What is the primary function of the muscular system?
a. To regulate body temperature
b. To provide support and movement for the body
c. To release hormones into the bloodstream
d. To filter waste products from the blood
Answer: b. To provide support and movement for the body
Rationale: The muscular system is responsible for movement and stability
in the body, allowing us to perform daily activities such as walking,
running, and lifting.
2. Which statement accurately describes the difference between skeletal,
cardiac, and smooth muscle?
a. Skeletal muscle is voluntary, cardiac muscle is involuntary, and smooth
muscle is both voluntary and involuntary
b. Skeletal muscle is involuntary, cardiac muscle is voluntary, and smooth
muscle is both voluntary and involuntary
c. Skeletal muscle is voluntary, cardiac muscle is involuntary, and smooth
muscle is involuntary
d. Skeletal muscle is involuntary, cardiac muscle is voluntary, and smooth
muscle is voluntary
Answer: c. Skeletal muscle is voluntary, cardiac muscle is involuntary,
and smooth muscle is involuntary
Rationale: Skeletal muscles are under voluntary control, meaning we can
consciously control their movements. Cardiac muscle is involuntary, as it
contracts without conscious control. Smooth muscle is also involuntary,
found in organs like the intestines and blood vessels.
3. What is the purpose of the neuromuscular junction?
a. To transmit electrical impulses from the brain to the muscles
b. To release neurotransmitters that stimulate muscle contractions
c. To regulate hormone production in the body
d. To filter waste products from the blood in the muscles
Answer: b. To release neurotransmitters that stimulate muscle contractions
Rationale: The neuromuscular junction is the point of communicationÂÂ
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