Digestive Physiology Lab Quiz

Fats is absorbed into:

lacteals

Monosaccharides and amino acids after absorption first travel to the:

liver through the portal vein

Which pH provided the highest pepsin activity?

pH 2

Trypsin and chymotrypsin

pancreatic protein digesting enzymes

Would pepsin be active in the mouth?

No, because pepsin is most active at acidic pH

Based on the pH in the stomach, would salivary amylase be active in the stomach?

No, because salivary amylase activity is best at neutral pH

Carbohydrate digestion begins in the mouth with salivary amylase. Which are other enzymes which help complete carbohydrate digestion?

Pancreatic amylase and brush border enzymes

Chylomicrons are

Protein coated droplets of fat

Absorption of fatty acids, amino acids, and monosaccharides occurs in the:

Small intestines

In the activity on carbohydrate digestion which enzyme digests carbohydrates?

Amylase

Which of the statements below best explains the function of bile salts during digestion?

Bile salts emulsify fats and break them down into smaller particles which gives the enzyme lipase a greater surface area to act on during digestion of fats

What does amylase do to starch?

Converts it to monosaccharides

What is released when fat digestion occurs?

Fatty acids

Which of the following best describes the action of bile?

It works by a physical process

Explain the difference in the fat digestion activity between tubes 1 ( which contained oil, bile and lipase) and 2 (which only contained lipase and oil).

The activity in tube 1 is more than tube 2

Which of the following applies to brush border enzymes ?

They are produced by the enterocytes of the small intensive. Lactase, maltase and aminopeptidase are some examples of brush border enzymes. They help digest carbohydrates and proteins in the small intestine. (All of the above)

In the absence of bile salts, fat will not be absorbed in the small intestine and will be passed out in the feces

True

chylomicrons are not delivered to the hepatic portal system, instead they travel in lymphatic vessels until they enter the venous system

True