Any Detectable Change in the Environment-Internal or External-Is Called a _______

Question

Any detectable change in the environment-internal or external-is called a _______.
A) sense
B) receptor
C) stimulus
D) stimulant

Accepted Answer

A stimulus is any detectable change in the environment, whether internal or external, that elicits a physiological or behavioral response. A sense refers to a faculty by which the body perceives an external stimulus, such as vision, hearing, or touch. A receptor is a specialized cell or protein that detects a specific stimulus and initiates a response. A stimulant is a substance that excites or activates the nervous system and increases physiological function.