Neurons Flashcards

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1
Q

What is the function of the nucleus?

A

To control the centre of the cell and also contains chromosomal DNA

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2
Q

What is the function of dendrites?

A

To receive nerve impulses or signals from adjacent neurons

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3
Q

What is an axon’s function?

A

To let electrical signals pass along

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4
Q

What is the function of the myelin sheath?

A

To protect the axon from external influences that can affect transmission of nerve impulses down the axon

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5
Q

What is the function of nodes of ranvier?

A

To speed up transmission of impulses by ‘forcing’ it to jump

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6
Q

What is the function of a terminal button (pre-synaptic neuron)

A

Send signals to an adjacent cell

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7
Q

What is the cell body?

A

Houses the nucleus

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8
Q

What is a Schwan cell?

A

Forms myelin sheath

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9
Q

What is the process of synaptic transmissions?

A

– Action potential travels down axon
-Causes vesicles (with neurotransmitters) to move and bind with wall and release into synaptic cleft
-Travel across cleft and bind to receptors
-Action potential continues
-Unused neurotransmitters are reabsorbed
-Or destroyed by enzymes

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10
Q

What is an excitatory neurotransmitter?

A

It is a synaptic connection which makes it more likely that the next neuron will fire (acetylcholine)

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11
Q

What is an inhibitory neurotransmitter?

A

A synaptic connection which will make it less likely that the next neuron will fire (GABA)

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