Hormones and nerves

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Hormones

Hormones are chemical messangers that travel in the blood to activate target cells.

Hormones are produced by various glands.

Hormones

Chemical message

Fast message 

Act for a long time

Act in a more general area

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Nerves

Neurones - transmit infomation as electrical impulses.

myelin sheath acts as an electrical insulator to stop the impulse from getting lost also speeds up message.

synapse gap between two neurones impulse is transmitted by neurotransmitters which diffuse across the gap the impulse is carried on in the next neurone

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thank you

thanks for revising

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