Digestive System

Question 1

Parietal cells secrete a glycoprotein called ______ that is essential for the absorption of vitamin B12 by the small intestine.

Answer 1

Intrinsic factor

Question 2

______ digests dietary proteins to shorter peptide chains, which then pass to the small intestine, where their digestion is completed.

Answer 2

Pepsin

Question 3

The stomach and intestines constitute the gastrointestinal (GI) tract. The teeth, tongue, salivary glands, liver, gallbladder, and pancreas are considered ______ organs of the digestive system.

Answer 3

Accessory Organs

Question 4

The ______ is a muscular tube extending from mouth to anus.

A) Esophagus
B) Small intestine
C) Digestive tract
D) Large intestine

Answer 4

C) Digestive tract

Question 5

Most of the digestive tract has a wall composed of the following tissue layers in order from the inner to the outer surface, they are:

Answer 5

Mucosa
Submucosa
Muscularis externa
Serosa

Question 6

When an organ is enclosed by mesentery (serosa) on all sides, it is considered to be within the peritoneal cavity, or ______.

A) retroperitoneal
B) intraperitoneal
C) mesentery cavity
D) thoracic cavity

Answer 6

Intraperitoneal