Question

Define the following terms
Stimulus​

Answer 1

Answer:

In physiology, a stimulus is a detectable change in the physical or chemical structure of an organism's internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity.

Explanation:

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Answer 2

Answer:

Hi friend_____,

★ 'Stimulus' refers to the changes in the environmental condition, that are detected by receptors in the body.

★ Receptor is a cell or a group of cells that receives the stimuli.

★ An effector is a part of the body which can respond to the stimulus.

I hope it will be helpful to you..(^.^)