Science (Biology)

 nervouse systym , vertebtrates , pollution indicators , variation , reproduction , cell division , genes, mutations, inherited disease

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Nerve structure and reflex arcs.

AXON - A long extension in the nerve

DENDRITES - Small parts of a cell

MYELIN - Sheath

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.

How are responses coordinated

1. Specific receptors in a sense organ detect a stimulus.

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. muscle or gland.)

5. The effector produces a response.

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