Unit VII - Visceral Afferents & Parasympathetics Flashcards Preview

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Flashcards in Unit VII - Visceral Afferents & Parasympathetics Deck (120)
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1

Which is generally considered cholinergic: sympathetics or parasympathetics?

Parasympathetics

2

Which is generally considered adrenergic: sympathetics or parasympathetics?

Sympathetics

3

Where are the cell bodies located in the visceral afferent system?

In posterior root ganglia or relevant cranial nerve ganglion

4

Where do sympathetic afferents travel?

Through sympathetic trunk and to spinal ganglia by passing through white ramus communicans

5

Where do parasympathetic afferents travel?

In sacral spinal nerves and cranial nerves

6

Preganglionic parasympathetic fibers are carried in what cranial nerves?

Oculomotor, facial, glossopharyngeal, and vagus nerves (3, 7, 9, and 10)

7

Preganglionic parasympathetic fibers are carried in what sacral spinal nerves?

2, 3, and 4

8

Where do preganglionic parasympathetic fibers generally synapse?

On postganglionic neurons in peripheral ganglia

9

What is the effect of postganglionic parasympathetic fibers on cardiac output?

Decreased

10

What is the effect of postganglionic parasympathetic fibers on the bronchial tree?

Constricts

11

What is the effect of postganglionic parasympathetic fibers on the pupils?

Constricts

12

What is the effect of postganglionic parasympathetic fibers on peristalsis?

Stimulates

13

What do the parasympathetic fibers of cranial nerves III, VII, and IX supply?

Structures in the head

14

What do the parasympathetic fibers of cranial nerve X supply?

Cardiac, respiratory, and digestive structures in the neck, thorax, and abdomen

15

What do the parasympathetic fibers of sacral spinal nerves 2, 3, and 4 supply?

Distal parts of the digestive system and urogenital systems

16

Which fibers have more variability in the amount of neurotransmitters available for use: pre or postganglionic?

Postganglionic

17

Dendrites of visceral afferent neurons carry impulses from viscera via what structures?

Via autonomic ganglia, plexus, or even somatic nerves (without synapse)

18

Axons of visceral afferent nerves enter the CNS through what structures?

Posterior root or specific spinal nerve

19

Visceral afferent neurons are associated with receptors that are sensitive to what kinds of things?

Pressure, chemical concentrations, and muscle stretching

20

What kinds of parasympathetic fibers are associated with cranial nerves 3, 7, 9, and 10 and S2-4?

Preganglionic

21

What neurotransmitter is most commonly used by the preganglionic parasympathetic fibers of cranial nerves 3, 7, 9, and 10 along with S2-4?

Acetylcholine

22

Where are preganglionic parasympathetic cell bodies located for cranial nerve III?

Accessory oculomotor nucleus

23

Where do preganglionic parasympathetic fibers of cranial nerve III synapse?

Ciliary ganglion

24

What is the location of the accessory oculomotor nucleus?

Periacqueductal gray - midbrain

25

Postganglionic fibers of cranial nerve III are carried in what nerves?

Short ciliary nerves

26

What muscles are supplied by the postganglionic fibers of cranial nerve III?

Sphincter pupillae and ciliary muscle

27

What is the action of the ciliary muscle?

Increase convexity of the lens to enable focus on closer objects

28

What is the action of the sphincter pupillae muscle?

Constriction of the pupil

29

Where are preganglionic parasympathetic cell bodies of the facial nerve located?

Superior part of salivary nucleus

30

The preganglionic parasympathetic fibers of the facial nerve exit the CNS via what nerve?

Intermediate nerve