Gastrointestinal System Quiz

Gastrocolic reflexes

• empty the stomach.

• release gastric secretions into the stomach.

• cause mass movements of the colon in response to food in the stomach.

• lead to churning contractions in the intestine in response to food in the stomach.

Select the CORRECT statement about absorption.

• 80% of ingested materials have been absorbed by the end of the large intestine.

• Lipids diffuse across the villus epithelium and are actively transported into the blood capillaries.

• If intact proteins are transported through the villus epithelium, an immune response maybe generated.

• Amino acid transport is linked to chloride transport.

In the treatment for gastritis, drugs to prevent the secretion of hydrochloric acid are normally prescribed. Prolonged ingestion of such drugs would inhibit the digestion of

• polysaccharides.

• lipids.

• proteins.

• disaccharides.

Suhara has a disease that causes a large portion of her gastric mucosa to atrophy resulting in less secretion by the gastric glands. As a result of this condition, Suhara may be expected to suffer from

• protein malnutrition.

• diarrhea.

• dehydration.

• pernicious anemia.

Aminah is 60 years old and all her wisdom teeth have been removed. On each side of her lower jaw, one canine and one molar are missing. What would the dental formula for her lower jaw be?

• 2-1-2-3

• 2-1-2-2

• 2-0-2-1

• 2-0-1-1

Which of the following statements regarding swallowing is TRUE?

• The voluntary phase begins in the mouth.

• In the pharyngeal phase, food is moved from the mouth into the pharynx.

• The uvula rises during the esophageal phase.

• Peristalsis occurs in all phases of swallowing.

Due to hepatic action, a comparison of blood entering and leaving the liver shows that blood leaving the liver contains

• more glucose and amino acids.

• less fatty acids and ingested toxic substances.

• more nutrients and waste material.

• less nutrients and waste material.

Tommy has had three fourths of his stomach removed because of bleeding gastric ulcers. Now he is at increased risk for developing.

• hemolytic anemia due to the lack of folic acid

• aplastic anemia due to the lack of iron

• hemorrhagic anemia due to the lack of vitamin b12

• pernicious anemia due to the lack of intrinsic factor

The functions of the gastrointestinal (Gl) tract include:

• provision of the body's nutritional requirements.

• breakdown of complex food molecules into simpler units.

• absorption of digestive products into the blood.

• production of various endocrine and exocrine secretions.

• elimination of wastes.

With regards to the general structure of the gastrointestinal (Gl) tract,

• the lumen of Gl tract is lined with stratified epithelium throughout its length.

• the epithelium of the Gl tract is being continuously replenished.

• the smooth muscles form an outer circular and an inner longitudinal layers.

• the internal lining is of mucous membrane throughout its length.

• the submucosa layer consists of connective tissue.