Nervous system ORGANIZATION

Cells of the nervous system

electrical signals, which are rapid and specific

Function 1

uses its millions of sensory receptors to monitor changes occurring both inside and outside the body; the gathered information is called sensory input.

Cells of the nervous system

electrical signals, which are rapid and specific

Function 1

uses its millions of sensory receptors to monitor changes occurring both inside and outside the body; the gathered information is called sensory input.

2

it processes and interprets
the sensory input and makes
decisions

3

it effects a response by
activating muscles or glands; the
response is called motor output

Examples of motor output

Activating muscles to move, such as lifting an arm or running, or stimulating glands to release hormones.

Examples of sensory input

Changes detected by sensory receptors, like feeling heat from a flame, hearing a sound, or seeing light.