Which of the following is characteristic of cardiac muscle?
A) Cardiac muscles are striated.
B) Cardiac muscles achieve tetany with every contraction.
C) Cardiac muscle fibers are multinucleated.
D) Cardiac muscles are faster than skeletal muscles.
E) Neurons that innervate cardiac muscles are under voluntary control.

Question

Quizplus · Accepted Answer

Cardiac muscles are striated, meaning that they have alternating light and dark bands that give them a striped appearance under a microscope. The other choices are not characteristic of cardiac muscle - cardiac muscles do not achieve tetany with every contraction, cardiac muscle fibers are usually uninucleated or only have a few nuclei, cardiac muscles are slower than skeletal muscles, and neurons that innervate cardiac muscles are not under voluntary control.

Which of the Following Is Characteristic of Cardiac Muscle