ANAT Autonomic Nervous System Innervation of the GIT - Week 3

Question 1

What nerves use ANS tracks to travel back to the CNS?

Answer 1

Visceral sensory using ANS tracks to travel back to the CNS. However, technically, ANS pathway only tracks from the CNS.

Question 2

What controls vascular tone in the GIT?

Answer 2

Sympathetic nerves.

Question 3

What organs in the body are dually innervated by sympathetic and parasympathetic nerves?

Answer 3

Heart & penis.

Question 4

Do parasymp & symp nerves communicate with each other?

Answer 4

Don’t directly communicate w each other, but do interact w each other.

Question 5

Pre-synaptic/pre-ganglionic ANS cell bodies reside where?

Answer 5

IMLCC.

Question 6

SMA & hypogastric plexus carry what nerves?

Answer 6

SMA & hypogastric plexus carry post-synaptic/post-ganglionic sympathetic fibres.

Question 7

Greater splanchnic nerves are what kind of fibres?

Answer 7

Pre-synaptic/pre-ganglionic sympathetic fibres.

Question 8

White rami communicans are what kind of fibres?

Answer 8

Pre-synaptic/pre-ganglionic sympathetic fibres.

Question 9

What kind of nerves are pelvic splanchnics?

Answer 9

Pre-synaptic, parasympathetic nerves.

Question 10

Where do parasympathetic, sympathetic and somatic motor axons exit the spinal cord?

Answer 10

Ventral root/ventral ramus.