FREE BIOLOGY AND STUDY GAMES ABOUT DIGESTIVE23

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FREE BIOLOGY AND STUDY GAMES ABOUT DIGESTIVE23

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -72 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: T/F: Chemical digestion of lipids is initiated in the mouth.

Answer:

False is initiated in the small intestine

Question 2: The lamina propria is composed of ________.

Answer:

loose connective tisuue

Question 3: Select the correct statement about electrolyte absorption.

Answer:

Iron and calcium are absorbed mostly by the duodenum.Question 4: T/F: The mucosa is found only in the jejunum because this is the only part of the small intestine in need of mucus.

Answer:

False

Question 5: There are three phases of gastric secretion. The cephalic phase occurs ________.

Answer:

before food enters the stomach and is triggered by aroma, sight, or thought

Question 6: The solutes contained in saliva include ________.

Answer:

electrolytes, digestive enzyme, mucin, lysozyme, wastes, and IgA Question 7: T/F: Ionic iron is actively transported into the mucosal cells, where it binds to the protein ferritin, a phenomenon called the mucosal iron barrier.

Answer:

True Question 8: The enzymatic breakdown of any type of food molecule is called ________.

Answer:

hydrolysis Question 9: T/F: The pancreas has both an endocrine and an exocrine function.

Answer:

True Question 10: When we ingest large molecules such as lipids, carbohydrates, and proteins, they must undergo catabolic reactions whereby enzymes split these molecules. This series of reactions is called ______.

Answer:

chemical digestion Question 11: Hydrochloric acid is secreted by which of the secretory cells of the stomach?

Answer:

parietal cells Question 12: In addition to storage and mechanical breakdown of food, the stomach ________.

Answer:

initiates protein digestion and denatures proteins

Question 13: The plicae circulares and intestinal villi are found in which of the four layers of the alimentary tube wall?

Answer:

mucosa Question 14: The terminal portion of the small intestine is known as the ________.

Answer:

ileum Question 15: T/F: The function of the enzyme salivary amylase is to begin digesting proteins.

Answer:

False digesting starch Question 16: T/F: The first teeth to appear are the deciduous teeth.

Answer:

True

Question 17: Peristaltic waves are ________.

Answer:

waves of muscular contractions that propel contents from one point to another

Question 18: Which of the following is not true of saliva?

Answer:

contains enzymes that begin the breakdown of proteins Question 19: Gastrin, histamine, endorphins, serotonin, cholecystokinin, and somatostatin are hormones that are released directly into the lamina propria. Which of the following cell types synthesize and secrete these products?

Answer:

enteroendocrine cells

Question 20: Hormones that inhibit gastric secretion include ________.

Answer:

secretin

Question 21: Which of these is not a component of saliva?

Answer:

nitric acid Question 22: T/F: The cell type of the wall of the large intestine, excluding anal cells, is very different from that of the small intestine

Answer:

True Question 23: T/F: Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCl.

Answer:

True Question 24: The capillaries that nourish the epithelium and absorb digested nutrients lie in the

________.

Answer:

lamina propria Question 25: T/F: Fats significantly delay the emptying of the stomach.

Answer:

True Question 26: T/F: The main chemical activity of the stomach is to begin the digestion of proteins.

Answer:

True

Question 27: The function of the hepatic portal circulation is to ________.

Answer:

collect absorbed nutrients for metabolic processing or storage Question 28: Digestion of which of the following would be affected the most if the liver were severely damaged?

Answer:

lipids