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Nervous system

The nervous system can coordinate a response to a stimulus, using nerve cells.

Nerve cells

, or

neurons

, are specialized cells that transmit

electrical impulses

around the body.

cell body nucleus

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How are responses coordinated?

When a stimulus is detected, your nervous system sends an impulse along neurons to and from different parts of the body to coordinate a response.

1.

Specific

receptors

detect a stimulus.

in a

sense organ

2.

An electrical impulse is sent to the

brain

.

3.

The brain processes the information.

4.

An electrical impulse is sent to an

effector

(e.g. a muscle or gland).

5.

The effector produces a

response

.

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The senses

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Parts of the nervous system

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