Nervous System 4- Autonomic Nervous System Flashcards Preview

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Flashcards in Nervous System 4- Autonomic Nervous System Deck (26):
1

autonomic nervous system is divided into...

parasympathetic NS
sympathetic NS

2

the vagus nerve is a part of the ____ section of the autonomic nervous system

parasympathetic

3

TRUE OR FALSE?
the sympathetic preganglionic neurons originate in the craniosacral region

false
preganglionic neurons originate from the thoracolumbar region of the spinal cord

4

CRANIO is symp or parasymp?

Cranio is parasympathetic

5

thoracolumbar is symp or parasymp?

thoracolumbar is sympathetic

6

sacral is symp or parasymp?

Sacral is parasympathetic, but now thought to be sympathetic

7

In the sympathetic chain ganglia, is the preganglionic neuron myelinated or unmyelinated?

myelinated. (white rami)

8

In the sympathetic chain ganglia, is the post ganglionic neuron myelinated or unmyelinated?

unmyelinated. (gray rami)

9

what is a ganglia?

collection of neuron cell bodies outside the central nervous system

10

both the sympathetic and parasympathetic release ____ from preganglionic neuron

ACh

11

TRUE OR FALSE
norepinephrine is non excitatory

false. Norepinephrine is usually excitatory.
epinephrine and NE are in adrenal gland

12

TRUE OR FALSE
Acetylcholine (ACh) can be excitatory or inhibitory

true

13

chain ganglia and collateral ganglia are in the ____ NS

sympathetic nervous system

14

in the distribution of sympathetic fibres, preganglionic fibres are short. What is the exception?

adrenal ganglia

- Adrenal ganglia have long preganglionic fibres and short postganglionic fibres. This is the exception to the sympathetic nervous system

15

in the sympathetic nervous system, the postganglionic fibres are typically ____

longer

16

collateral ganglia is also called

prevertebral ganglia (sympathetic)

17

where is it that the ganglia are not paired?

celiac, superior mesenteric, inferior mesenteric

18

splanchnic nerves are ___ and converge in ____ganglia

Splanchnic nerves are preganglionic and converge in collateral ganglia

19

In the sympathetic collateral ganglia, the post ganglionic nerves innervate

visceral organs in the abdominopelvic region such as digestive system

20

Suprarenal (adrenal) medulla releases ____&____

epinephrine (75%) & norepinephrine
They act like all other postganglionic NS, but more slowly and for longer duration

21

Where are the ganglions in the parasympathetic nervous system?

near or on the target organs

22

the vagus nerve makes up ___% of the parasympathetic outflow

75%

23

where does the vagus nerve originate?

medulla oblongata

24

The vagus nerve is the longest of the cranial nerve. It wanders from the brain into which organs?

vagus nerve wanders from the brain into organs in the neck, chest, and abdomen (except kidneys, bladder, and sex organs)

25

what is the general function of the parasympathetic nervous system?

rest/recover/regenerate
relax, food processing, energy absorption

26

true or false
The adrenal medulla is considered an endocrine extension of the parasympathetic nervous system


false