The Nervous system Biology Unit 1

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  • Created by: Elliej-23
  • Created on: 24-01-16 12:28
What is a neurone?
A neurone is a specilised cell that transmits nerve impulses.
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What is a synapse?
A junction between two nerve cells consisting of a small gap across which a chemical impulse is defused accross.
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What is an effector?
An organ or cell that scts in resonse to a stimulus.
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What does a sensory neurone do?
Carries signals from receptors to the spinal chord and brain, CNS?
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What is the brain?
An organ of soft nervous tissue contained in the skull functioning as the coordinating centre. The brain recieves signals from neurones.
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What is the spinal chord?
A cylindrical bundle of nerve fibres and tissue that connects nearly all parts of the body to the brain.
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What is a stimulus?
A change in the environment of an organism.
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What is an impulse?
The movement of an action along a nerve fibre in response to a stimulus.
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What does a relay neuron do?
Carrie messages from one part of the CNS to another.
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What does a motor neurone do?
Carries signals from the CNS to the effector.
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What does the word flex mean?
To bend somthing, e.g an arm or leg using a muscle.
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What are the ear canals?
A passage of bone and skin leading to the eardrum.
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What is the deffinition of temperature?
How hot or cold something is.
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What is the definition of pressure?
A constant force on an object or part of the body.
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What is the definition of the word chemicals?
A compound or substance.
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What are taste buds?
Part of the tongue's taste receptors.
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Describe the pathway of a reflex action.
Receptor - sensory neurone - synapse - relay neurone - synapse - motor neurone - effector(Muscle or gland)
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Other cards in this set

Card 2

Front

A junction between two nerve cells consisting of a small gap across which a chemical impulse is defused accross.

Back

What is a synapse?

Card 3

Front

An organ or cell that scts in resonse to a stimulus.

Back

Preview of the back of card 3

Card 4

Front

Carries signals from receptors to the spinal chord and brain, CNS?

Back

Preview of the back of card 4

Card 5

Front

An organ of soft nervous tissue contained in the skull functioning as the coordinating centre. The brain recieves signals from neurones.

Back

Preview of the back of card 5
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