ITEM BANK neurons
Integrative function
Motor function
Sensory function
nerve impulses

1. - to sense changes (known as stimuli) both outside and within the body. For example the eyes sense changes in light and
the ear responds to sound waves. Inside the body, stretch receptors in the stomach indicate when it is full and chemical receptors in the blood vessels
monitor the acidity of the blood.
2. -processing the information received from the sense organs. The impulses from these organs are analysed and stored as
memory. The many different impulses from different sources are sorted, synchronised and co-ordinated and the appropriate response initiated. The
power to integrate, remember and apply experience gives higher animals much of their superiority.
3. - The third function is the response to the stimuli that causes muscles to contract or glands to secrete.
All nervous tissue is made up of nerve cells or .These transmit high-speed signals called which
can be thought of as being similar to an electric current.