Autonomic Nervous System Flashcards Preview

Hannah's Neuro > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (10):
1

Where do autonomic pathways NOT originate?

Cervical and lumbar enlargements

2

What are the major points of origin in the spinal cord for the PNS and SNS respectively?

PNS: craniosacral
SNS: thoracolumbar

3

What is the difference between PNS and SNS in terms of the location of their ganglia?

PNS: ganglia tend to be close to or within organs
SNS: ganglia more distant from organs

4

What are the 2 main chains of ganglia for the SNS?

Prevertebral
Paravertebral (sympathetic chain)

5

What is the difference in terms of myelination between pre-ganglionic and post-ganglionic neurons of the ANS?

Pre-ganglionic: lightly myelinated or unmyelinated
Post-ganglionic: all unmyelinated

6

What is the NT and receptor in the pre-ganglionic synapse of the SNS?

ACh acting on nicotinic receptors

7

What is the NT and receptor in the post-ganglionic synapse of the SNS?

Mostly NA acting on adrenoceptors
Few ACh acting on muscarinic receptors

8

What is the NT and receptor in the pre-ganglionic synapse of the PNS?

ACh acting on nicotinic receptors

9

What is the NT and receptor in the post-ganglionic synapse of the PNS?

ACh acting on muscarinic receptors

10

Give an example of ACh acting on muscarinic receptors in the SNS post-ganglionic synapse

Cholinergic secretomotor axons innervating sweat glands