Question

Differentiate between external and internal stimuli

Answer 1

All living organisms respond to stimuli. The stimulus may be either internal or external.

External stimulus: An external stimulus is the one which the organism receives from its external environment.

Internal stimulus: An internal stimulus is the one which arises within the body.

External stimulus	Internal stimulus
An external stimulus is the one which the organism receives from its external environment.	An internal stimulus is the one which arises within the body.
The external stimulus includes touch and pain, vision, smell, taste, sound, and balance.	Examples of internal stimulus include hunger, thirst, and emotional states.