Physiology: feeding & satiety Flashcards
what is energy homeostasis
the process by which energy intake is matched to energy expenditure over time
describe the causes of obesity (3)
consuming more calories than expended, increased levels of inactivity and increased consumption of high calorie foods over time
describe how genetics can influence obesity
susceptibility genes can give an individual increased risk of developing disease
but are not essential for disease
what environmental factors can influence obesity
occupation, money
what are some consequences of obesity (4)
stroke, type 2 diabetes, cancer, heart disease
describe the effect of obesity on the brain
difficult to lose weight once gained, brain views extra weight as normal and tries to hold on to it
in what ways does the CNS influence energy balance and body weight (3)
behaviour(feeding + physical activity) ANS activity(regulates energy expenditure) neuroendocrine system(secretion of hormones)
what does the integration of behaviour, ANS activity and neuroendocrine sytem determine + what is the site of this
feeding behaviour
site = hypothalamus
what the 3 basic concepts of the feeding behaviour control system
satiety signalling
adiposity negative feedback signalling
food reward
what is satiation
sensation of fullness generated during a meal
what is satiety
period of time between termination of one meal and initiation of next
what is adiposity
state of being obese
