What is Homeostasis?

Homeostasis is the body's ability to maintain stable internal conditions in response to the changing external environment.

For example, when it is warm outside, a person's body temperature may begin to rise, and the body must react to counteract the increase.

Receptors, control centers, and effectors coordinate the necessary physiological changes to respond to a variable.

In the case of an increase in body temperature, thermoreceptors on skin cells detect the elevated temperature and relay the message through nerve impulses to the brain, the control center.

The brain compares the stimulus with a set point— the physiological range of the variable. The set point for a normal human body temperature is approximately 37°C.

When the body temperature exceeds the set point, the brain signals the effectors, the sweat glands, to produce sweat. Evaporation of the sweat cools down the body.

Once the body temperature returns to the set point, the receptors send feedback to the brain to reduce sweat production, ensuring homeostasis is maintained.