stages involved in human nutrition

Question 1

ingestion

Answer 1

taking substances (e.g food and drinks) into the body through the mouth

Question 2

digestion

Answer 2

breakdown of large, insoluble food molecules into smal, water-soluble molecules using mechanical and chemical means

Question 3

absorption

Answer 3

movement of digested food molecules through the wall of the intestine into the blood

Question 4

assimilation

Answer 4

movement of digested food molecules into the cells of the body where they are used, becoming part of the cells.

e.g glucose would be used for respiration, amino acids would be used by the cell to make proteins such as enzymes, hormones, antibodies etc)

Question 5

egestion

Answer 5

the passing out of food that has not been digested, as faeces, through the anus

e.g fibre cannot be digested and so is egested in the faeces

Question 6

what is mechanical digestion

Answer 6

the breakdown if food molecules into smaller pieces withiut chemical change to the food molecules

Question 7

what is chemical digestion

Answer 7

the breakdown of large, insoluble molecules into small, soluble molecules. it involves thr action of ejich enzymes break chemical bonds in zhe food.