Question 1

Gastric peristalsis:

Accepted Answer

A) Originates in the distal half of the stomach. 
B) Is characterized by strong contractions of the antrum at the end of the wave. 
C) Ejects all the contents of the antrum into the duodenum. 
D) Decreases in intensity as it sweeps toward the pylorus. 
A) Originates in the distal half of the stomach. 
B) Is characterized by strong contractions of the antrum at the end of the wave. 
C) Ejects all the contents of the antrum into the duodenum. 
D) Decreases in intensity as it sweeps toward the pylorus. B

Question 2

The gastric peristalsis :

Accepted Answer

A) Depends on the basis of electric rhythm (BER). 
B) Originates at the mid point of the greater curvature and increases in intensity as it sweeps towards the pylorus. 
C) Is associated with a strong contraction of the antrum ant the end of each wave. 
D) Always ejects the contents of the gastric antrum into the duodenum. 
A) Depends on the basis of electric rhythm (BER). 
B) Originates at the mid point of the greater curvature and increases in intensity as it sweeps towards the pylorus. 
C) Is associated with a strong contraction of the antrum ant the end of each wave. 
D) Always ejects the contents of the gastric antrum into the duodenum. A

Question 3

The main function of the cardiac sphincter of the stomach is to:

Accepted Answer

A) Prevent the reflux of the gastric contetnt to the esophagus 
B) Facilitate storage of food on the lower part of the esophagus 
C) Mix the food particles entering the stomach. 
D) Control the rate of food entry into the stomach. 
A) Prevent the reflux of the gastric contetnt to the esophagus 
B) Facilitate storage of food on the lower part of the esophagus 
C) Mix the food particles entering the stomach. 
D) Control the rate of food entry into the stomach. A

Question 4

So-called hunger pangs :

Accepted Answer

A) Are truly due to smooth muscle spasm of the transverse colon. 
B) Are associated with esophageal and pyloric contraction that coexist with an empty relaxed stomach. 
C) Are more common if starvation is associated with hypoglycaemia. 
D) May occur in a totally vagotomized patient. 
A) Are truly due to smooth muscle spasm of the transverse colon. 
B) Are associated with esophageal and pyloric contraction that coexist with an empty relaxed stomach. 
C) Are more common if starvation is associated with hypoglycaemia. 
D) May occur in a totally vagotomized patient.

Question 5

Which of the following substances is released from the duodenal mucosa in response to acidic gastric juice?:

Accepted Answer

A) Histamine 
B) Secretin 
C) Norepinephrine 
D) Acetyle choline 
A) Histamine 
B) Secretin 
C) Norepinephrine 
D) Acetyle choline

Question 6

The stomach is a poor area for absorption primarily because:

Accepted Answer

A) Most foods are swallowed before ptyalin has a chance to breakdown starch 
B) pH of the stomach is too high 
C) The junction between epithelial cells presents wide space for fluid/ion movement 
D) The stomach lacks villous membranes. 
A) Most foods are swallowed before ptyalin has a chance to breakdown starch 
B) pH of the stomach is too high 
C) The junction between epithelial cells presents wide space for fluid/ion movement 
D) The stomach lacks villous membranes.

Question 7

It's believed that in parietal cells of the gastric mucosa (which secrete hydrochloric acid), an active transport system is responsible for the transmembrane passage of:

Accepted Answer

A) Chloride 
B) Carbon dioxide. 
C) Bicarbonate. 
D) Water 
A) Chloride 
B) Carbon dioxide. 
C) Bicarbonate. 
D) Water

Question 8

About pepsins:

Accepted Answer

A) There are 5 types of exopeptidase enzymes. 
B) They are secreted by endocytosis as active enzymes. 
C) They are incapable of autoactivation 
D) Their optimum pH of action is 1.6- 3.2. 
A) There are 5 types of exopeptidase enzymes. 
B) They are secreted by endocytosis as active enzymes. 
C) They are incapable of autoactivation 
D) Their optimum pH of action is 1.6- 3.2.

Question 9

The enterogastric reflex can be elicted by which of the following?:

Accepted Answer

A) Distension of the duodenum 
B) Acid chime in the duodenum. 
C) Hyperosmotic chime in the duodenum. 
D) All of the above 
A) Distension of the duodenum 
B) Acid chime in the duodenum. 
C) Hyperosmotic chime in the duodenum. 
D) All of the above

Question 10

Which of the following hormones is involved in the initiation of the migrating motor comples?:

Accepted Answer

A) Gastrin 
B) Motilin 
C) Secretin 
D) Cholecystokinin 
A) Gastrin 
B) Motilin 
C) Secretin 
D) Cholecystokinin

Question 11

The secretion of gastrin by the pyloric antrum ceases:

Accepted Answer

A) When the stomach is distended by a full meal 
B) When the gastric mucosa contents have a pH of about 2.0 
C) If histamine is injected. 
D) If the vagi are stimulated. 
A) When the stomach is distended by a full meal 
B) When the gastric mucosa contents have a pH of about 2.0 
C) If histamine is injected. 
D) If the vagi are stimulated.

Question 12

Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:

Accepted Answer

A) Resistant to enzymes secreted into the lumen of the gastrointestinal tract. 
B) Alkaline, and thus a poor buffer for alkaline foods. 
C) A non-amphoteric protein. 
D) Easily removed from the surface of the stomach by the gastric secretions during the gastric phase of digestion. 
A) Resistant to enzymes secreted into the lumen of the gastrointestinal tract. 
B) Alkaline, and thus a poor buffer for alkaline foods. 
C) A non-amphoteric protein. 
D) Easily removed from the surface of the stomach by the gastric secretions during the gastric phase of digestion.

Question 13

Acid secretion in ulcer disease can be reduced by which of the following?

Accepted Answer

A) Blockage of secretin secretion 
B) Blockage of histamine H? receptors. 
C) Blockage of action of pepsin 
D) Treatment with antibiotics. 
A) Blockage of secretin secretion 
B) Blockage of histamine H? receptors. 
C) Blockage of action of pepsin 
D) Treatment with antibiotics.

Question 14

Basal acid output is increased with which of the following :

Accepted Answer

A) Acidification of the antrum. 
B) Administration of a H? receptor antagonist. 
C) Vagotomy. 
D) Alkalinization of the antrum. 
A) Acidification of the antrum. 
B) Administration of a H? receptor antagonist. 
C) Vagotomy. 
D) Alkalinization of the antrum.

Question 15

Gastric HCL secretion :

Accepted Answer

A) Is a passive process that occurs in all parts of the stomach. 
B) Is stimulated by somatostatin,cimetidine & pyrenzepine. 
C) Is inhibited by histamine,gastrin & acetylcholine. 
D) plays a significant rule in iron absorption. 
A) Is a passive process that occurs in all parts of the stomach. 
B) Is stimulated by somatostatin,cimetidine & pyrenzepine. 
C) Is inhibited by histamine,gastrin & acetylcholine. 
D) plays a significant rule in iron absorption.

Question 16

Pepsin, secreted by the gastric mucosa:

Accepted Answer

A) Continues to act in the neutral medium of the duodenum. 
B) Is proteolytic on the mucosal surface, in the alkaline medium provided by the mucus secreted by the surface cells of the stomach. 
C) Is synthesized within the chief cells. 
D) Doesnot increased in concentration in response to the mental stimuli found in the so'called cephalic phase of gastric digestion 
A) Continues to act in the neutral medium of the duodenum. 
B) Is proteolytic on the mucosal surface, in the alkaline medium provided by the mucus secreted by the surface cells of the stomach. 
C) Is synthesized within the chief cells. 
D) Doesnot increased in concentration in response to the mental stimuli found in the so'called cephalic phase of gastric digestion

Question 17

Hydrochloric acid secretion:

Accepted Answer

A) Is accomplished by passive diffusion. 
B) Requires the dissociation of water with subsequent exchange of the hydrogen ion for potassium ion. 
C) Requires anaerobic metabolism. 
D) Utilize protein molecules to neutralize OH? remaining in the secretory cells. 
A) Is accomplished by passive diffusion. 
B) Requires the dissociation of water with subsequent exchange of the hydrogen ion for potassium ion. 
C) Requires anaerobic metabolism. 
D) Utilize protein molecules to neutralize OH? remaining in the secretory cells.

Question 18

The secretion of the intrinsic factor occurs in :

Accepted Answer

A) Parietal cells of the stomach. 
B) Chief cells of the stomach. 
C) Upper duodenum. 
D) Beta cells of pancreas. 
A) Parietal cells of the stomach. 
B) Chief cells of the stomach. 
C) Upper duodenum. 
D) Beta cells of pancreas.

Question 19

Under normal condition, the gastric secretion is:

Accepted Answer

A) Not affected by presence of food in the stomach. 
B) Stimulated by norepinephrine and inhibited bu curare. 
C) Increased by distention of the stomach. 
D) Maximal before food ingestion. 
A) Not affected by presence of food in the stomach. 
B) Stimulated by norepinephrine and inhibited bu curare. 
C) Increased by distention of the stomach. 
D) Maximal before food ingestion.

Question 20

A 45 years old man is found to have a condition in which the parietal cells of his stomach have been destroyed by an autoimmune mechanism. This condition is often associated with which of the following?:

Accepted Answer

A) Prenicious anaemia. 
B) Gastric ulcerarion 
C) Steatorrhea. 
D) Protein deficiency. 
A) Prenicious anaemia. 
B) Gastric ulcerarion 
C) Steatorrhea. 
D) Protein deficiency.

Gastric peristalsis:

The gastric peristalsis :

The main function of the cardiac sphincter of the stomach is to:

So-called hunger pangs :

Which of the following substances is released from the duodenal mucosa in response to acidic gastric juice?:

The stomach is a poor area for absorption primarily because:

It's believed that in parietal cells of the gastric mucosa (which secrete hydrochloric acid), an active transport system is responsible for the transmembrane passage of:

About pepsins:

The enterogastric reflex can be elicted by which of the following?:

Which of the following hormones is involved in the initiation of the migrating motor comples?:

The secretion of gastrin by the pyloric antrum ceases:

Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:

Acid secretion in ulcer disease can be reduced by which of the following?

Basal acid output is increased with which of the following :

Gastric HCL secretion :

Pepsin, secreted by the gastric mucosa:

Hydrochloric acid secretion:

The secretion of the intrinsic factor occurs in :

Under normal condition, the gastric secretion is:

A 45 years old man is found to have a condition in which the parietal cells of his stomach have been destroyed by an autoimmune mechanism. This condition is often associated with which of the following?:

Gastrointestinal Hormones and Functions

Digestive Physiology

Gastric Secretion and Vomiting

Pancreatic and Liver Secretions and Functions

Digestive System: Bile Secretion, Gallbladder Functions, and Succus Entericus Absorption

Absorption and Motility in the Small Intestine

Digestive System Motility and Secretion

Filters

Exam 3: Gastric Secretion and Functioning of the Stomach

Gastric peristalsis:

The gastric peristalsis :

The main function of the cardiac sphincter of the stomach is to:

So-called hunger pangs :

Which of the following substances is released from the duodenal mucosa in response to acidic gastric juice?:

The stomach is a poor area for absorption primarily because:

It's believed that in parietal cells of the gastric mucosa (which secrete hydrochloric acid), an active transport system is responsible for the transmembrane passage of:

About pepsins:

The enterogastric reflex can be elicted by which of the following?:

Which of the following hormones is involved in the initiation of the migrating motor comples?:

The secretion of gastrin by the pyloric antrum ceases:

Mucous presents on the surface of the mucosa of the stomach,smal and large intestine is:

Acid secretion in ulcer disease can be reduced by which of the following?

Basal acid output is increased with which of the following :

Gastric HCL secretion :

Pepsin, secreted by the gastric mucosa:

Hydrochloric acid secretion:

The secretion of the intrinsic factor occurs in :

Under normal condition, the gastric secretion is:

A 45 years old man is found to have a condition in which the parietal cells of his stomach have been destroyed by an autoimmune mechanism. This condition is often associated with which of the following?:

Gastrointestinal Hormones and Functions

Digestive Physiology

Gastric Secretion and Vomiting

Pancreatic and Liver Secretions and Functions

Digestive System: Bile Secretion, Gallbladder Functions, and Succus Entericus Absorption

Absorption and Motility in the Small Intestine

Digestive System Motility and Secretion

Filters