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AQA GCSE Biology B1.2.1 The nervous system
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- 1What does the nervous system enable?Humans to react to their surroundings and coordinate their behavior
- 2What do receptors do?Detect stimuli (changes in the environment)
- 3What are the receptors in the eyes sensitive to?Light
- 4What are the receptors in the ears sensitive to?-Sound
-Changes in position and enable us to keep our balance - 5What are the receptors in the nose and tongue sensitive to?sensitive to chemicals and enable us to taste and to smell
- 6What are the receptors in the skin sensitive to?Touch, pressure, pain and to temperature changes
- 7What type of cell is light receptor most similar to and what do they include?-Animal cells
-Have a nucleus, cytoplasm and cell membrane - 8How is information from receptors passed to the brain?Passes along cells (neurones) in nerves to the brain
- 9What does the brain coordinate?Response
- 10What are reflex actions described as?Automatic and rapid
- 11Describe a simple relay action■impulses from a receptor pass along a sensory neurone to the central nervous system
■ at a junction (synapse) between a sensory neurone and a relay neurone in the central nervous system, a chemical is released that causes an impulse to be sent along a relay neurone
■ a chemical is then released at the synapse between a relay neurone and motor neurone in the central nervous system, causing impulses to be sent along a motor neurone to the organ
(the effector) that brings about the response
■ the effector is either a muscle or a gland, a muscle responds by contracting and a gland responds by releasing (secreting) chemical substances. - 12—
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- GCSE Biology Fichas sobre AQA GCSE Biology B1.2.1 The nervous system, creado por larah02 el 30/04/2016.
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