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 communication