What is meant by stimulus and reaction?
Stimulus is the change in the environment or environmental factors to to which the organism can respond or react. Theresponse shown by organisms towards or awaya stimulus is called reaction.
Write down the function of sympathetic and para- sympathetic nervous system.
The function of sympathetic nervous system is it increase the activities of the heart, stomach lungs, intestine, etc.
The function of para sympathetic nervous system is to bring activities of the heart, stomach, Intestine, etc. to normal condition.