Chapter 23 Sample Quiz Key
1. What occurs mostly in the small intestines that is part of the digestive process?
The correct answer is B. Absorption

B. Absorption is a passage of nutrients and minerals from food in the GI tract into the blood. This process takes place mostly in the small intestines.

A. Chemical Digestion is the complex food molecules broken down by enzymes. It begins in the mouth and ends in the small intestines.

C. Defecation is the elimination of indigestible substances. It takes place in the large intestines and its end product is feces.

D.Propulsion is when the food goes through the GI tract. The process begins as you swallow food. You no longer have control of any food and substances after you swallow.

2. Which tunica of the GI tract is made up of dense connective tissue with elastic
fibers that helps the stomach regain its shape?
The correct answer is A. Submucosa

A. The Submucosa is made up of dense connective tissue with nerves, blood and lymph vessels. It has elastice fibers to help regain the shape of the stomach.

B. The Lining Epithelium is the first layer within the Mucose Tunica of the GI tract. It is made up of simple columnar with goblet cells which seceret mucous. It helps food move and protects the organs from digestive enzymes.

C. The Serose is the superficial layer of the GI tract. It is made up of areolar and it is the outer protective later with very little epithelium. It uses connective tissue for attachment.

D. The Muscularis is circular and longitudinal smooth muscle which moves food through the GI tract.

3. Which gastric gland produces acidic mucous?
The correct answer is C. Neck / Mucous

C. the neck / mucous is in the upper gastric glands and it produces acidic mucous.

A. Cheif is found in the lower gastric glands and it produces pepsinogen which is an inactive form of pepsin which is an enzyme that breaks down proteins.

B. Parietal is located in the middle portion of the gastric gland. It secretes HCL and kills bacteria. It is necessary for the release of pepsin which is an enzyme that breaks down proteins.

D. Enterendocrine secretes hormones such as gastrin which stimulates production of HCL and papsinogen.

4. What are the folds of mucosa within the stomach when it is empty?

D. Rugae are folds of mucosa within the stomach when it is empty. It can hold about 1 gallon of food.

A. Fundus can be found within the stomach. It is dome shaped and beneath the diaphragm.

B. The Teniae Coli can be found within the large intestines. It is 3 bands of smooth longitudinal muscle which forms pockets known as haustra.

C. Haustra are pockets within the teniae coli.