Answer:
Explanation:
A stimuli is any sensation or action that produces a response in a tissue or organ.
Stimulus is the plural noun of stimuli.
There are two types of stimulus:
external stimulus which comes from outside the body
internal stimulus which comes from within the body.
The body responds to stimulus in order to adapt to changes in both its external and internal environment.
For example, when the envrionment is hot, the brain receives stimulus from heat receptors and then we start to sweat in order to cool down.
Stimulus are received by sense organs in the body
There are five sense organs in the body;
eye - for sight
ear - for hearing
nose - for smelling
skin - for feeling
mouth - for tasting
Sensory receptors in sense organs receives stimulus and send it to the brain through the sensory neurons.
The brain processes the stimulus and send messages back through motors neurons to appropriate organs and tissues to act in response to the stimulus.
Therefore, response to stimulus is essential for an organism to survive and adapt in its environment.
Learn more about stimulus at: brainly.com/question/937756
