B3

Cards (21)

  • Bile is made by liver, stored in gallbladder and used in small intestine
  • Bile emulsifies fats and neutralises stomach acid
  • Amylase is produced by salivary glands, pancreas and small intestine
  • Amylase breaks down starch into sugars by catalysing reaction in mouth and small intestine
  • Proteases is produced by stomach, pancreas and small intestine
  • Protease catalyses breakdown of proteins into amino acids in stomach and small intestine
  • Lipase is produced by pancreas and small intestine and is secreted in the small intestine
  • Lipase catalyse the breakdown of lipids into fatty acids and glycerol
  • Protease enzymes work best in acidic conditions and glands of stomach wall produce hydrochloric acid for this
  • Proteases, amylase and lipase work best in alkaline conditions in small intestine
  • Villi are adapted to absorb soluble food efficiently
  • Villi have large surface area to absorb food molecules by active transport and diffusion, thin wall to provide short diffusion path and good blood supply to carry food molecules away to maintain a conc gradient
  • A tissue is a group of cells of similar structure working together to perform a particular function
  • Organs are made from group of different tissues working together to perform particular function
  • Organ systems are a group of organs with related functions, working together to perform body functions within the organism
  • Digestive system includes glands like pancreas and salivary glands, stomach, liver, small intestine , large intestine
  • In digestion, glands like pancreas and salivary glands produce digestive juices containing enzymes
  • In digestion, stomach is where digestion takes place
  • In digestion, liver produces bile
  • In digestion, small intestine where digestion occurs and has large number of villi where absorption of soluble food occurs
  • In digestion, large intestine where water is absorbed from undigested food producing faeces