Biochemistry: lipid catabolism Flashcards
what does fat intake without appropriate energy expenditure lead to
increase in number of adipocytes and more fat in adipocytes
obesity
what is fat required for
energy source
for essential fatty acids
for fat soluble vitamins
what is the role of triglycerides
main energy storage form in adipose tissue
what do triglycerides consist of
glycerol and 3 fatty acids
describe the structure of fatty acids
mainly straight chains, no rings and usually even number of carbons
what are the 3 different types of fatty acid
saturated(no double bonds)
unsaturated(contains one double bond)
polyunsaturated(contains many double bonds)
what are the main products of fat digestion
glycerol, fatty acids and monoglycerides
what cells is fat absorbed in to
absorbed into mucosal cells of intestine
what happens to short + medium chain fatty acids once they are absorbed
they enter portal blood
what happens to long chain fatty acids and monoglycerides once absorbed
they are resynthesised to triglycerides
what are dietary fats coated with during digestion
chylomicrons, = a layer of protein, cholesterol and phospholipid
what happens to chylomicrons at muscle and adipose tissue
they are attacked and cleaved by lipoprotein lipases
what can free fatty acids be used for
resynthesised into triglycerides(in adipose tissue for storage)
oxidised to provide energy(in muscle)
