ANS spinal nerves

Question 1

what is it split into

Answer 1

ympathetic part, parasympathetic part and enteric nervous system

Question 2

Describe the enteric ns

Answer 2

extensive, web-like structure of reflex pathways that control the digestive functions
muscle contraction/relaxation, secretion/absorption, and blood flow

Question 3

The SNS and PNS motor pathways consist of a two neuron series:

Answer 3

a preganglionic neuron with a cell body in the CNS and a postganglionic neuron with a cell body in the periphery that innervates target tissues.

Question 4

Parasympathetic part

Answer 4

oculomotor3, facial7, glossopharyngeal9, vagus 10 and sacral splanchnic nerves

Question 5

Sympathetic part

Answer 5

consists of cell bodies in the lateral horn of the spinal cord from T1 to L2.

Question 6

Difference between sym and parasym preganglionic fibers

Answer 6

sympathetic preganglionic fibers are shorter and form more synapses than parasym.

Question 7

Diff in terms of postganglionic fibers between sym and para

Answer 7

sympathetic division use noradrenaline as a neurotransmitter. Parasympathetic division use acetylcholine.

Question 8

Mixed plexus, examples

Answer 8

composed of sympathetic and parasympathetic fibers

cardiac plexus, pulmonary plexus, Esophageal plexus, Abdominal aortic plexus, Superior hypogastric plexus, Inferior hypogastric plexus.