Question

What is Homeostasis? And how is the physiological system of equilibrium work in the homeostasis?   

Answer 1

Answer

Homeostasis is the state of balance or equillibrium betwen external environment and internal environment of the body.

The physiological system of equilibrium contains 5 components :

1) Stimulus : Any change in the internal or external environment is a stimulus.
Example : Rise in the body temperature

2) Receptor : Rceptors detect the change and send an input via afferent pathway to the brain.
Example : Thermoreceptors in the skin

3) Control center : Brain is the control center that integrates the information.
Example : Thermoregulatory center in the brain

4) Effector : Control center sends output via efferent pathway to the effector organ.
Example : Sweat glands

5) Response : The desired physiologic change in order to maintain homeostasis is response.
Example : Increased sweat production (Evaporation of sweat leads to fall in the body temperature)

In this way, physiological system of equilibrium works in the homeostasis.