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Flashcards in The Autonomic Nervous System Deck (16)
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1

Where are preganglionic neurons located?

in the CNS

2

where are postganglionic neurons located?

in the PNS

3

compare the size of the parasympathetic pre and postganglionic neurons

parasympathetic:

preganglionic neurons - long
postganglionic neuron - short

4

where are the cell bodies of parasympathetic preganglionic neurons located?

1.) brain
2.) sacral spina cord fray matter

5

where are sympathetic preganglionic neurons located?

thoracolumbar spinal gray matter

6

compare the size of the sympathetic pre and postganglionic neurons

sympathetic:

preganglionic neurons - short
postganglionic neuron - long

7

True or false; sympathetic is catabolic

TRUE

8

what type of neurotransmitter is released at the pre and postganlionic neurone of the parasympathetic division of the ANS?

ACh at both pre and post

9

There are two kinds of ACh receptors in the parasympathetic division of the ANS. What are they called?

1. nicotinic (on the post ganglionic neurone)
2. muscarinic (on the target tissue)

10

what do pre and post ganglionic neurons in the sympathetic division release?

preganglionic - ACh
postganglionic - norepinephrine

*exception is sympathetic postganglionic innervation of sweat glands

11

what are the 2 chemical transmission exceptions in the sympathetic division ??

1. sweat glands that release ACh at their postganglionic neurone
2. adrenal medulla which does not have a post ganglionic neuron and instead itself releases NA and A

12

describe the effects of parasympathetic and sympathetic action at the pupils

parasymp - constriction

sympathetic - dilation

13

miosis

constricted pupil

14

what does the sympathetic innervation do to blood pressure and cardiovascular function?

- increased CO and vasoconstriction (increased BP)

15

are blood vessels in the skin controlled by sympathetic and parasympathetic innervation?

no, only sympathetic

16

micturition

bladder emptying;