Digestion

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1. How much is the daily salivary output in a healthy individual?

0.15 l

0.35 l

0.75 l

2 l

It is believed that the average person produces approximately 0.75 l of saliva per day.

2. How is the enzyme called that breaks carbohydrates / starch into smaller sub-units (sugar)?

Amylase

Alliinase

Pepsin

Lipase

Amylase is an enzyme that breaks starch down into sugar.

3. The so called Intrinsic factor is necessary for the absorption of which vitamin?

Vitamin A

Vitamin B1

Vitamin B12

Vitamin C

Intrinsic factor is a glycoprotein produced by the parietal cells of the stomach. It is necessary for the absorption of vitamin B12 later on in the terminal ileum.

4. In which organ is bile produced, which aids the process of digestion of lipids?

Gallbladder

Liver

Kidney

Pancreas

Bile or gall is secreted by hepatocytes from the liver of most vertebrates. It is stored (but not produced) in the gallbladder.

5. How big is the surface of the human intestine?

7 square meters

25 square meters

75 square meters

600 square meters

Because of the intestinal villi and microvilli the surface of the human intestine is about 600 square meters.

6. Which is NOT a salivary gland?

Parotid Gland

Subparotid Gland

Submandibular Gland

Sublingual Gland

The subparotid gland does not exist.