EVERYDAY SCIENCE

Detailed explanation-1: -The immediate reaction by an individual to a particular stimulus is called response. These kind of reactions are not learned, they are inborn. Thus response to a stimulus is an example of instinctual behaviour.

Detailed explanation-2: -physiological response to stimulus. Definition: Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus.

Detailed explanation-3: -Therefore, sensitivity is the ability of an organism to respond to external stimulus.

Detailed explanation-4: -A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.