Autonomic Physiology Flashcards Preview

Science for Medicine > Autonomic Physiology > Flashcards

Flashcards in Autonomic Physiology Deck (13):
1

What does the ANS control?

The subconscious activities of the body

2

What are the two subdivisions of the ANS?

- sympathetic
- parasympathetic

3

What is the outflow from the sympathetic system?

Thoracolumbar with nerves coming from T1-12 and L1-2

4

Where are the ganglia in the sympathetic system?

Close to the vertebrae in the sympathetic trunk

5

In the sympathetic system, the preganglionic fibres usually

- enter the trunk
- make the synapse
- have a long postganglionic fibre

6

What is the outflow from the parasympathetic system?

Crania-Sacral with innervation from III, VII, IX and X from the cranial and sacral nerves

7

Parasympathetic fibres

- usually have long preganglionic fibre
- ganglion close to the target

8

Acetylcholine acts on

Cholinergic receptors
- muscarinic
- nicotinic

9

Norepinephrine acts on

Adrenergic receptors
- alpha receptors
- beta receptors

10

All preganglionic fibres, whether they're sympathetic or parasympathetic release

ACh onto nicotinic receptors

11

In sympathetic nerves, postganglionic fibres release

norepinephrine onto alpha or beta receptors

12

In the adrenal gland

norepinephrine and epinephrine are released directly into the blood

13

In parasympathetic nerves, postganglionic fibres release

ACh onto muscarinic receptors