The nervous system has three basic functions:
1. drag and drop answer here 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.
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2. drag and drop angler here-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. drag and drop answer here
The third function is the response to the
stimuli that causes muscles to contract or glands to
secrete.
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All nervous tissue is made up of nerve cells or drag and drop answer here
These transmit high-speed signals called drag and drophore
can be thought of as being similar to an electric current.
which