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.
What are nerves? Differentiate between afferent and efferent nerves.
Nerves are the communication lines for transmitting impulses from one part of the body to another.
The difference between afferent and efferent nerves are:
Afferent | Efferent |
It transmits impulses from different part of the body to brain or spinal cord. | It transmits impulses from brain or spinal cord to different parts of body. |
They are also called sensory nerves. | They are also called motor nerves. |