| 1 |
What is the function of villi and microvilli in the small intestine. |
Increase surface area for absorption
Produce enzymes
Store bile
Neutralize stomach acid
|
| 2 |
Why is segmentation imporant in the small intestine. |
It absorbs bile
It mixes food with digestive juices
It breaks down enxymes
It pushes food to the rectum
|
| 3 |
Which stomach scretion activates pepesin and kills bacteria. |
Bile
Hydrochloric acid
Sodium bicarbonate
Mucus
|
| 4 |
Why is lipase not active in the stomach |
It is destroyed by acid
It needs alkaline pH to work
It is secreted by the liver
It digests only proteins
|
| 5 |
Which change woould most affect protein digestion. |
Inhibiting pepsin production
Blocking bile release
Inhibiting salivary gladns
Slowing peristalsis
|
| 6 |
Why does the enzyme activity drops in the stomach when pH rises. |
Acid blocks food entry
Enzymes need acdic pH to work
Enzymes denature in low pH
Saliva dilutes gastric juice
|
| 7 |
What prevents food form entering the trachera during swallowing. |
Epiglottis
Oesophageal sphincter
Uvula
Tongue
|
| 8 |
Which enzyme in saliva start breaking down starch |
Amylase
Lipase
trpsin
Pepsin
|
| 9 |
Where does chemical digestion of carbohydrates being. |
Oesophagus
Stomach
Mouth
Small intestine
|
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