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What is the Nervous system, and what does it do?
The Nervous system is a network of nerve cells and fibres which transmits nerve impulses between parts of the body. This allows us humans to react to the surroundings.
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What is a Receptor, and what does it do?
It is a cell which detect stimuli (changes in the environment)
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What are the different Receptors and what do they do?
Eyes, sensitive to light. Ears, sensitive to sound and gravitational changes. Tounge and nose, sensitive to chemicals and enable us to smell. Skin, detect changes in Temperature, pressure and pain.
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What are the Three types of Neurones?
Sensory Neurone, Relay Neurone, Motor Neurone.
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Can you Describe briefly a simple reflex action?
Impulses from a receptor pass along a sensory neurone to the nervous system, meet the synapse between a sensory neurone and relay neurone chemical diffuses to the relay neurone. impulses sent along a motor neurone to the organ of response.
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How are Light receptor cells different from the other receptor cells?
The have a nucleus, cytoplasm and a cell membrane.
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Card 2

Front

What is a Receptor, and what does it do?

Back

It is a cell which detect stimuli (changes in the environment)

Card 3

Front

What are the different Receptors and what do they do?

Back

Preview of the front of card 3

Card 4

Front

What are the Three types of Neurones?

Back

Preview of the front of card 4

Card 5

Front

Can you Describe briefly a simple reflex action?

Back

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