receptors+and+effectors+athen+ww

receptors and effectors

Receptors are groups of specialised cells. They can detect changes in the environment, which are called //stimuli//, and turn them into electrical impulses.Receptors are often located in the sense organs, such as the ear, eye and skin.

reflex arc Reacting to Changes • You need to keep the conditions inside your body constant.Doing this is called homeostasis. small changes inside your body can cause its cells to be damaged or destroyed.Yet, there are big changes going on outside your body. • You need to detect a change in the environment, a stimulus, and react to the change ( a response in a way that maintains homeostasis . When you do this without thinking, it is called a reflex.