Autonomic nervous system Flashcards

1
Q

what is the somatic nervous system

A

conscious control of skeletal muscle

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2
Q

what is parasympathetic/sympathetic division based on

A

CNS - location of cell body of preganglionic cells

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2
Q

what features do the axons of the somatic nervous system have

A

they are myelinated and extend from the CNS to the effector (skeletal muscle)

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3
Q

what features do the axons of the autonomic nervous system have

A

a two-neuron chain

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4
Q

what is the two neuron chain made of in the autonomic nervous system

A

1st is preganglionic nerve and 2nd is post ganglionic nerve

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5
Q

what are ganglia

A

cell bodies of many peripheral autonomuc neurones occur un clusters and form swellings on nerve trunks

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6
Q

what are preganglionic autonomic fibres

A

axons that form synapses with ganglion cells

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7
Q

what are post ganglionic fibres

A

axons innervating effector cells

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8
Q

what are varicosities

A

packets of NT known as vesicles

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9
Q

what releases NT in post ganglionic neurones

A

varicosities

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10
Q

what NT does a preganglionic nerve release and what is the transmission called

A

Acetylcholine, cholinergic transmission

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11
Q

what NTs does a post ganglionic nerve release and what are the transmission called (2)

A
  1. Acetylcholine, cholinergic transmission
  2. noradrenaline, noradrenergic transmission
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12
Q

what is NANC

A

non-adrenergic non-cholingeric neurotransmission

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13
Q

what are co-transmitters

A

not main transmitters, can be transmitters in own right or can support/ modulate NT

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14
Q

2 types of co transmitters

A

NT, neuromodulators

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15
Q

what does the autonomic nervous system do (2)

A
  1. conveys all outputs from the CNS to the rest of the body except the motor innervation of skeletal muscle
  2. regulates non voluntary processes in homeostasis
16
Q

what processes in homeostasis does the ANS control (4)

A

1.heartbeat
2.contraction of smooth muscle of various organs and blood vessels
3.exocrine secretions
4. energy metabolism

17
Q
A