The characteristic of the muscle cell that directly causes movement is:
A) excitability.
B) irritability.
C) contractility.
D) extensibility.

Question

Quizplus · Accepted Answer

The characteristic of muscle cells that directly causes movement is contractility. This refers to the ability of muscle fibers to contract or shorten when stimulated by a nerve impulse, allowing for movement of body parts or internal organs. Excitability and irritability both refer to the ability of muscle cells to respond to stimuli, such as an electrical impulse from a nerve or a chemical signal. Extensibility refers to the ability of muscle cells to stretch or lengthen, which is important for movements that require flexibility or range of motion, but does not directly cause movement.

The Characteristic of the Muscle Cell That Directly Causes Movement