Question

With the help of a suitable example, explain the term ‘stimulus.’

Answer 1

Stimulus:

• The stimulus is a substance which affects reactions like excitement or energy. The stimulus affects the reaction so the rate of the reaction will be increased. The stimulus may be internal or external.
• So for an example, our sensory organs ear, the skin is sensitive in response to the stimulus. So the stimulus can be analyzed as the substance which makes an effect on the behavior of any organism.
• By using stimulus the behavior of the organism became change as the result of the use of the stimulus.

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Answer 2

A stimulus is something that causes a reaction.

Explanation:

A stimulus is something that causes a reaction. The reaction can be physical or chemical. The ability of an organism to respond to such external stimuli is called sensitivity.

We can see this stimuli in many common examples. When a plant grows towards the window, it is reacting to the stimulus of light. When we touch the leaves of a touch-me-not, the plant responds by closing its leaves. We can also witness this when a person turns to respond to a touch.

In all these examples, the plant or person receives and external stimuli, which causes a reaction and a resulting action is performed.