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12 Cards in this Set
- Front
- Back
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Name the point where neurons connect with other neurons or muscle fibres. |
Synapse |
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Describe the role of neurotransmitters. |
Neurotransmitters relay impulses across a synapse |
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Whish structures store neurotransmitters? |
Vesicles |
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What happens to vesicles on the arrival of an impulse? |
Vesicles fuse with the membrane of pre-synaptic neuron and release neurotransmitter |
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How do neurotransmitters travel across a synapse? |
They diffuse across the synapse and bind to receptors on the membrane of the postsynaptic neuron. |
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What structures do neurotransmitters bind to? |
Receptors. |
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What is the function of receptors? |
Determine if a signal is excitatory or inhibitory and accept/bind to neurotransmitters. |
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What is the term used to describe the minimum number of neurotransmitters required to transmit the impulse? |
Threshold. |
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How are neurotransmitters removed? |
By enzymes or re-uptake into pre synaptic neuron |
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Why is the removal of neurotransmitters needed? |
To prevent continuous stimulation of post synaptic neuron |
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What is summation? |
Series of weak stimuli can release enough neurotransmitter to reach the threshold and release an impulse |
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Name some neurotransmitters? |
Noradrenaline, acetylcholine |
