Neural Digestion Flashcards
What do proteins, sugars and fats break down into?
Proteins- amino acids
Sugars- simple sugars, eg. glucose
Fats- fatty acids and glycero
Bacterial fermentation breaks down cellulose via?
Short chain fatty acids
What are short chain fatty acids important for?
energy metabolism of mucosa in colon of humans and important signalling molecules
what parts of digestion is somatic NS involved in?
chewing, swallowing, peristalsis and opening of key sphincters
what parts of digestion is visceral neurons involved in?
salivation, secondary peristalsis, all functions from stomach to anus
T/F- Visceral neuons only contain the enteric NS
False- they include sympathetic and PNS, visceral afferents and ENS
T/F- upper 1/3 of oesophagus is striated muscle
false- 2/3
What was Pavlov intersted in?
how NS conrolled acid and digestive enzyme secretion in stomach
T/F- Chewing depends on motor pattern generator in brain stem
True
Tongue is a voluntary/involutary set of musceles controlled via brainstem/motor cortex
voluntary, motor cortex
Primary peristalsis is controlled by which which nerve?
Vagus
Whats primary and secondary function of upper and lower eosphageal sphincters?
regulate reflux
Primary- relax when food goes in
Secondary- close immediately after food gets in
Stomach has a major peripheral control netowrk under substantial central regulation via which nerve?
Vagus
What is the other control network of the stomach?
non-neural pacemaker in antrium (interstitial cells of cajal)
Where does absorption of water and nutrients occur specifically?
Water- ileum, colon?
