human digestive system

Cards (10)

what is the main function of the human digestive system?
digest food & absorb nutrients obtained from digestion
role of pancreas & salivary gland in the digestive system
produce digestive juices containing enzymes
role of stomach in digestive system
produces hydrochloric acid - kills bacteria & provides the optimum pH for protease action
role of small intestine in the digestive system
site where soluble food molecules are absorbed into the bloodstream
role of the liver in the digestive system
produces bile (stored in the gall bladder) which emulsifies lipids & allows lipase to work more efficiently
bile is alkaline to neutralise stomach acid
role of large intestine in the digestive system
absorbs water from undigested food, producing faeces
role of enzymes in the digestive system
act as biological catalysts which speed up the rate of biological reactions without being used up
how does the shape of an enzyme effect its function?
they have a specific active site shape which is complementary to their substrate
what is metabolism?
sum of all reactions in a cell or organism
describe the lock and key theory
shape of enzyme active site & substrate are complementary
they bind together
substrate is broken down into products