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BMS109 Cell & Molecular > Nervous Tissue > Flashcards

Nervous Tissue Flashcards

1
Q

What is the neuron

A

functional part fo the nervous system

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2
Q

What are the channels in neuron membranes

A

transmembrane pore

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3
Q

How are voltage gated channels opened

A

changes in voltage across the membrane

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4
Q

What channel moves ions against their concentration gradient

A

specialised sodium/potassium pump

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5
Q

How are ligand gated membrane channels opened?

A

attachment of signalling molecules - conformational change

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6
Q

Which channel is slower to open

A

ligand gated

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7
Q

What are neuroglia

A

supportive cells

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8
Q

What is the function of neuroglia

A

supply nutrients to neurons, maintenance

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9
Q

Where are neuroglia found

A

PNS and CNS

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10
Q

What are astrocytes

A

nutritional cells in CNS

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11
Q

What is the function of astrocytes

A

take away metabolic by products

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12
Q

What is the function of myelin

A

maintain high voltage

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13
Q

What are microglia

A

phagocytic cells

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14
Q

What is the function of microglia

A

engulf, destroy harmful material

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15
Q

What is the effect of large diameter on action potential

A

larger diameter = faster action potential

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16
Q

What is the most common excitatory neurotransmitter

A

glutamate

17
Q

What is the most common inhibitory neurotransmitter

A

GABA

18
Q

What neurotransmitter do microglia cells destroy

A

neuropeptides

19
Q

What breaks down ACh

A

acetylcholinesterase

20
Q

What neurotransmitters are transported back into the pre-synaptic terminal

A

serotonin and noradrenaline

21
Q

What is the pre-ganglionic neurotransmitter in the sympathetic nervous system

A

ACh

22
Q

What is the post-ganglionic neurotransmitter in the sympathetic nervous system

A

noradrenaline

23
Q

Where in the body are the pre and post synaptic neurotransmitters both ACh

A

sweat glands

24
Q

Are sweat glands innervated by sympathetic or parasympathetic system

A

sympathetic

25
Q

What is Prozac

A

selective serotonin re-uptake inhibitor

26
Q

What are nuclei

A

groups of cell bodies in CNS

27
Q

What are ganglia

A

groups of cell bodies in PNS

28
Q

What are tracts

A

groups of axons in the CNS

29
Q

What is epineurium

A

binds axons together by connective tissue, in PNS

BMS109 Cell & Molecular (26 decks)

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