GI Nervous System

Question 1

Enteric Nervous System (ENS)

Answer 1

Intrinsic nervous system of the GI tract

Co-ordinates muscular, secretive and absorptive activities

Question 2

Autonomic Nervous System (ANS)

Answer 2

Parasympathetic and Sympathetic

Question 3

ANS - Parasympathetic

Answer 3

Synapse between pre- and post- ganglionic occurs within ENS
Cranio-sacral outflow:-
Cranial outflow - CNX innervates oesophagus, stomach, SI, asc colon
Sacral outflow - S2-S4 innervates desc colon, sigmoid colon, rectum

Speeds up peristalsis
Increases motility, secretion, blood flow, contraction

Question 4

ANS - Sympathetic

Answer 4

Post ganglionic fibres innervate mainly intestinal neurones
Leave spinal cord between T5-L2

Slows down peristalsis
Decreases motility, secretion, blood flow