What is an internal stimulus?


An internal stimulus is anything that gives a person stimulation from within, such as the body's hormones, parasites, diseases, ongoing conditions or internal injuries. These contrast with external stimuli, which act on the body from the outside and generally consist of anything that engages at least one of the five senses. Understanding how internal stimuli work helps people understand how the body works.

One type of internal stimulus comes from homeostatic imbalances. The body is full of sensors and receptors that monitor ongoing changes. Known as thermoreceptors, chemoreceptors and mechanoreceptors, these sensors respond to alterations in temperature, chemistry and physical pressure respectively. One type of mechanoreceptor is the baroreceptor, which picks up variances in blood pressure, and another is hair cells that have the ability to pick up sound stimuli. Changes in levels for oxygen, nutrients, water and ions also attract the attention of these sensors. When enough deviation takes place, the mind picks up a homeostatic response in the form of fatigue, thirst or pain which is designed to produce behavior that brings the body back to normal.

The mechanoreceptors also monitor cardiac output, heart rate and blood pressure. Nerves work their way into these receptors, and when stretching gets the nerves' attention, they send action potential messages to the central nervous system, keeping blood vessels from constricting and dropping the heart rate.

Q&A Related to "What is an internal stimulus?"
Here is an example: You are hot, so you sweat in order to cool yourself off.
There are two kinds of stimuli including external stimuli or internal stimuli. Internal
Fingering a girl until she squirts pussyjuice.
To motivate from within
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