Which of the following describes the cells of unitary smooth muscle?
A) They exhibit spontaneous action potentials.
B) They are used for vision and hair raising.
C) They depend upon recruitment using the autonomic nervous system.
D) They consist of muscle fibers that are structurally independent of each other.

Question

Quizplus · Accepted Answer

Unitary smooth muscle cells exhibit spontaneous action potentials due to the presence of pacemaker cells that generate electrical signals, allowing for coordinated contractions without input from the nervous system. Choice B is incorrect because the cells involved in vision and hair raising are part of the skeletal muscle system, not smooth muscle. Choice C is incorrect because unitary smooth muscle cells do not require recruitment through the autonomic nervous system. Choice D is incorrect because unitary smooth muscle cells are connected by gap junctions and act as a single unit, rather than individual muscle fibers that are structurally independent.

Which of the Following Describes the Cells of Unitary Smooth