Biology chapter 7

site of starch absorption

mouth / small intestine

reabsorption of water

small intestine / colon (large intestine)

secretion of pepsin

stomach

site of maltose digestion

small intestine

secretion of bile

liver / gall bladder

storage of faeces

rectum

secretion of lipase and trypsin

pancreas

the type of digestion that breaks down large pieces of food

mechanical

the type of substance released by the bacteria, during respiration that causes tooth decay

acid

the names of the 2 parts of a tooth that are dissolved by the substance released by bacterial respiration

enamel

dentine

outline the roles of bile

neutralises stomach acid -by providing a suitable pH for enzymes in the small intestine

emusifies fats - breaking larger fat droplets into smaller fat droplets, increasing the surface area for lipase to act on

explain why lactose is not absorbed by the small intestine

large soluble food molecule

must be broken by the enzymes lactase into glucose and galactose which can be absorbed into the blood

role of kidney in excretion

removes urea from the blood

remove excess mineral ions and water from the blood

used to form urine which passes through the ureters to the bladder