Saturday, 23 February 2013
2.85 understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses
Receptors send a electrical impulse through nerves when stimulate by a stimulus. This message goes to the CNS, here a response is decided and then sent strait back out in electrical impulses through nerves to the effector. The impulses are very fast, as is the reaction time.