Question

The protective mechanism that involves an external stimulus leading to an immediate muscular contraction is called

A. a depolarization potential.
B. an action potential.
C. a reflex arc.
D. a stimulus threshold.

Answer 1

c. protective mechanism is a reflex

Answer 2

C. a reflex arc.

Step-by-step explanation:

Reflex arc is the term used to describe the body's immediate and involuntary response to arousal of a sensory nerve. For this to happen, the external stimulus is applied to the body and before reaching the brain, this stimulus receives a response in the body's marrow, causing an immediate involuntary muscle contraction without the will or awareness of the body.