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

Question

Quizplus · Accepted Answer

Cardiac muscle cells are striated, meaning they have a banded appearance under a microscope. This is a characteristic shared with skeletal muscle cells. Option B, achieving tetany with every contraction, is not characteristic of cardiac muscle as it should not experience tetany. Option C, multinucleated fibers, is a characteristic of skeletal muscle, not cardiac muscle. Option D, faster fibers, is not true as cardiac muscle fibers are slower than skeletal muscle fibers. Option E, voluntary control over innervation, is not true for cardiac muscle as the neurons that innervate it are part of the autonomic nervous system and are therefore not under conscious control.

Which of the Following Is Characteristic of Cardiac Muscle