Physiology: feeding & satiety 2 Flashcards
when do satiation signals increase
during meals to limit meal size
name 4 satiation signals
cholecystokinin(CCK)
peptide YY(PYY)
glucagon-like peptide(GLP-1)
oxyntomodulin(OXM)
when is CCK released
in proportion to lipids + proteins in meals
when is PPY released
levels increase rapidly over a meal
when in GLP-1 released
in response to food ingestion(by C cells)
when in oxyntomodulin released
after a meal
what is ghrelins role
it is a hunger signal
describe how levels of ghrelin increase or decrease in relation to a meal
levels increase before a meal
decrease after meals
what effect does peripheral ghrelin have
stimulates food intake, decreases energy expenditure and decreases fat utilisation
(increases body weight)
what effect do glutamate, gaba and opiods have on food behaviour when injected into hypothalamic centre
increase food intake(short lasting)
what effect do monoamines have on food behaviour
suppress food intake
