23. The Digestive System

Both Paneth cells and Peyer’s patches are more numerous in the ileum than in the jejunum or the duodenum. Which statement below correctly describes why that may be?

Which of the following is/are absorbed in the small intestine by the Na+/glucose cotransporter?

a. Glucose

b. Galactose

c. Fructose

d. Both a and b are correct

e. All of the above are correct

Gastric bypass surgery involves creating an alternate pathway for food that bypasses the majority of the stomach and a portion of the small intestine to help patients lose weight. A schematic is shown below.

Why do you think it is important to attach the duodenum to the jejunum even if food is no longer passing through it?

Which of the following statements are true about motility in the small intestine:

I. Peristalsis will generally propel chyme towards the ileocecal valve.

II. The efficiency of chemical digestion can be increased through segmentation.

III. Peristalsis and segmentation use the same muscles, but contract in different patterns.

Which pathway correctly identifies the path of chyme as it moves through the small intestine?

Two chyme samples are taken: one from the stomach and one from the duodenum. How could you tell the samples apart using lab techniques?

The brush border enzymes are associated with which level of the small intestine?

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

e. During feeding, the small intestine exhibits motion in the migrating motor complex pattern.

Match the letter of the digestive organ shown in the figure with its function.

___ segmentation occurs here

Regional movements that occur in the small intestine and function to churn and fragment the digestive material are called:

(a) Segmentation

(b) Pendular movements

(c) Peristalsis

(d) Mass movements

(e) Mastication