Skeletal muscles are:
A) Composed of either type I (slow) or type II (fast) fibers
B) Composed of rapidly dividing cells
C) Composed of nondividing cells that can be stimulated to enter mitosis by a variety of cytokines
D) In close contact with nerves
E) Major storage sites of calcium and phosphate

Question

Quizplus · Accepted Answer

Skeletal muscles are in close contact with nerves and receive signals from the nervous system to contract and relax.

Answer: A
 Skeletal muscles are composed of either type I (slow) or type II (fast) fibers, which have different properties such as contraction speed and endurance.

Answer: C, E
 Both options C and E are incorrect. Skeletal muscles are composed of nondividing cells called muscle fibers and are not able to enter mitosis. Additionally, while skeletal muscles do play a role in calcium homeostasis, they are not major storage sites of calcium and phosphate.

Skeletal Muscles Are