Lecture 30: Autonomic Systems Flashcards Preview

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Flashcards in Lecture 30: Autonomic Systems Deck (13):
1

Autonomic:

- Two neurons between the CNS and effector

2

Somatic vs autonomic efferent pathways:

S:

- innervates skeletal muscle
- always excitatory

A:

- innervates smooth, cardiac, glands, GI neurons
- can be excitatory or inhibitory

3

Sympathetic preganglionic neurons emerge from...

- thoracolumbar region

4

Presympathetic preganglionic neurons emerge from...

- cranial region

5

Ionotropic:

- Receptors contain an ion channel

6

Metabotropic:

- receptors linked to intercellular (metabolic) messengers

7

Rest and digest and....?

- Molest

8

Why is there no preganglionic cell for the adrenal medulla?

- Activation of the adrenal gland, adrenaline straight into the blood, no ganglion

9

What effect does sympathetic tone have on blood vessels?

- Can widen or narrow lumen

10

Involuntary actions include...

- Regulation of physiological states
- Reflexes

11

Voluntary controls include...

- Self-regulation of emotional response
- Eg fear, anxiety

12

What system is responsible for the constriction of pupils?

- parasympathetic

13

Somatic:

- One motor neuron between the CNS and the effector

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