Digestive System - Year 11 ATAR Human Biology Exam Questions and Answers

Digestive System - Year 11 ATAR Human
Biology Exam Questions and Answers

Digestive System Purpose ANSWERS - The Human Body needs raw materials for
cell reactions, for maintaining cell parts and for the production of new cells
- Raw materials are ingested as larger chunks of food containing complex molecules.
- Larger chunks of food needs to be broken down into simple molecules so it can be
transported to body cells
- The simple molecules then diffuse into blood then into body cells.

Alimentary canal ANSWERS Continuous tube connecting the mouth and anus

Associated Organs ANSWERS tongue, teeth, salivary glands, pancreas, liver, gall
bladder

Small Intestine ANSWERS About 6m long, the lining secretes intestinal juice
which contains many enzymes
Internal surface is covered with villi to increase absorption of nutrients of digested food.

Rectum ANSWERS Final part of the small intestine where faeces are produced

Anus ANSWERS Opening surrounded by the anal sphincter, voluntary muscle.

Pancreatic amalyse ANSWERS Breaks down starch into disaccarides in small
intestine

Pancreatic Protease ANSWERS Breaks down proteins and polypeptides into
pepides within the small intestine

Mouth Cavity ANSWERS - Mechanical digestion by teeth
- Chemical digestion by of starch by saliva (salivary amalayse)

Pharynx ANSWERS Moving upwards and backwards, tongue pushes food into the
pharynx for swallowing

Salivary Glands ANSWERS - Three Pairs of Glands Produce saliva works to
dissolve food so it can be tasted
- Saliva contains mucus that lubricates the mouth and holds food in a lump for
swallowing
- Salivary Amalayse for chemical digestion