Question 1

Intrinsic factor is

Accepted Answer

A)  secreted by the parietal cells in the stomach 
B)  necessary for absorption of vitamin B12 
C)  abundant in pernicious anemia 
D)  secreted by the parietal cells in the stomach and necessary for absorption of vitamin B12 
E)  none of these 
A)  secreted by the parietal cells in the stomach 
B)  necessary for absorption of vitamin B12 
C)  abundant in pernicious anemia 
D)  secreted by the parietal cells in the stomach and necessary for absorption of vitamin B12 
E)  none of these

Question 2

CCK causes relaxation of the sphincter of Oddi.

Accepted Answer

A) True 
 B)False

Question 3

Which statement is incorrect?

Accepted Answer

A)  Trypsinogen is secreted in an inactive form. 
B)  Pancreatic amylase digests carbohydrate. 
C)  Pancreatic lipase is responsible for triglyceride digestion. 
D)  Except for trypsinogen, other proteolytic enzymes are secreted in active form. 
E)  Trypsinogen is activated by enterokinase. 
A)  Trypsinogen is secreted in an inactive form. 
B)  Pancreatic amylase digests carbohydrate. 
C)  Pancreatic lipase is responsible for triglyceride digestion. 
D)  Except for trypsinogen, other proteolytic enzymes are secreted in active form. 
E)  Trypsinogen is activated by enterokinase.

Question 4

How long does it take for an epithelial cell to migrate from the base of the villi to the tip?

Accepted Answer

A)  three hours 
B)  three days 
C)  one day 
D)  three months 
E)  several weeks 
A)  three hours 
B)  three days 
C)  one day 
D)  three months 
E)  several weeks

Question 5

Complete each of the following statments.
The most potent stimulus for gastrin release is ____________________. Gastrin, in turn, is a powerful stimulus for ____________________ in the stomach. The PGA is directly inhibited from releasing gastrin by ____________________.

Accepted Answer

protein in the stoma

Question 6

Which of the following are functions of aqueous NaHCO3 secreted by the pancreas into the duodenum?

Accepted Answer

A)  neutralization of acidic gastric contents emptied into the duodenum 
B)  prevention of irritation of the duodenal mucosa 
C)  active digestion of fat molecules into fatty acids 
D)  neutralization of acidic gastric contents emptied into the duodenum, and prevention of irritation of the duodenal mucosa 
E)  none of these 
A)  neutralization of acidic gastric contents emptied into the duodenum 
B)  prevention of irritation of the duodenal mucosa 
C)  active digestion of fat molecules into fatty acids 
D)  neutralization of acidic gastric contents emptied into the duodenum, and prevention of irritation of the duodenal mucosa 
E)  none of these

Question 7

The process of digestion starts as food enters the stomach.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is an active proteolytic enzyme?

Accepted Answer

A)  pepsinogen 
B)  chymotrypsinogen 
C)  procarboxypeptidase 
D)  secretin 
E)  none of these 
A)  pepsinogen 
B)  chymotrypsinogen 
C)  procarboxypeptidase 
D)  secretin 
E)  none of these

Question 9

The typical coloration of the feces is due to

Accepted Answer

A)  bile salts 
B)  undigested cellulose 
C)  aqueous NaHCO3 secretion 
D)  modified bilirubin 
E)  disintegrated epithelial cells 
A)  bile salts 
B)  undigested cellulose 
C)  aqueous NaHCO3 secretion 
D)  modified bilirubin 
E)  disintegrated epithelial cells

Question 10

The pharyngoesophageal sphincter is normally closed and its main function is to prevent esophageal secretions from entering the pharynx during breathing.

Accepted Answer

A) True 
 B)False

Question 11

Fat soluble vitamins

Accepted Answer

A)  are digested by lipases 
B)  are actively absorbed 
C)  are absorbed in micelles 
D)  are absorbed through the digestive tract 
E)  are passively absorbed with anions 
A)  are digested by lipases 
B)  are actively absorbed 
C)  are absorbed in micelles 
D)  are absorbed through the digestive tract 
E)  are passively absorbed with anions

Question 12

Which of the following factors is the most potent stimulus for inhibition of gastric motility?

Accepted Answer

A)  fat in the duodenum 
B)  acid in the duodenum 
C)  acid in the stomach 
D)  distention of the stomach 
E)  hypertonicity of the duodenal contents 
A)  fat in the duodenum 
B)  acid in the duodenum 
C)  acid in the stomach 
D)  distention of the stomach 
E)  hypertonicity of the duodenal contents

Question 13

Salivary secretion is

Accepted Answer

A)  entirely under neural control (i.e., there is no hormonal control of salivary secretion). 
B)  a passive secretion. 
C)  stimulated by the parasympathetic nervous system and inhibited by the sympathetic nervous system. 
D)  entirely under neural control (i.e., there is no hormonal control of salivary secretion)and a passive secretion. 
E)  entirely under neural control (i.e., there is no hormonal control of salivary secretion)and stimulated by the parasympathetic nervous system and inhibited by the sympathetic nervous system. 
A)  entirely under neural control (i.e., there is no hormonal control of salivary secretion). 
B)  a passive secretion. 
C)  stimulated by the parasympathetic nervous system and inhibited by the sympathetic nervous system. 
D)  entirely under neural control (i.e., there is no hormonal control of salivary secretion)and a passive secretion. 
E)  entirely under neural control (i.e., there is no hormonal control of salivary secretion)and stimulated by the parasympathetic nervous system and inhibited by the sympathetic nervous system.

Question 14

Vomiting is initiated by stimulation of chemoreceptors in the medulla.

Accepted Answer

A) True 
 B)False

Question 15

The pyloric gland area of the stomach antrum secretes

Accepted Answer

A)  histamine 
B)  gastrin 
C)  intrinsic factor 
D)  histamine and gastrin 
E)  histamine and intrinsic factor 
A)  histamine 
B)  gastrin 
C)  intrinsic factor 
D)  histamine and gastrin 
E)  histamine and intrinsic factor

Question 16

Complete each of the following statments.
Chylomicrons are large, coated droplets of ____________________.

Accepted Answer

The answer of Complete each of the following statments.
Chylomicrons are...

Question 17

Which statement regarding control of pancreatic secretion is correct?

Accepted Answer

A)  Gastrin stimulates release of neutralization solution. 
B)  CCK stimulates release of enzymes. 
C)  Secretin stimulates release of bicarbonate. 
D)  All of these. 
E)  CCK stimulates release of enzymes, and secretin stimulates release of bicarbonate. 
A)  Gastrin stimulates release of neutralization solution. 
B)  CCK stimulates release of enzymes. 
C)  Secretin stimulates release of bicarbonate. 
D)  All of these. 
E)  CCK stimulates release of enzymes, and secretin stimulates release of bicarbonate.

Question 18

Cholecystokinin

Accepted Answer

A)  is secreted by the endocrine portion of the pancreas 
B)  stimulates pancreatic enzyme secretion 
C)  causes contraction of the gallbladder 
D)  stimulates pancreatic enzyme secretion and causes contraction of the gallbladder 
E)  none of these 
A)  is secreted by the endocrine portion of the pancreas 
B)  stimulates pancreatic enzyme secretion 
C)  causes contraction of the gallbladder 
D)  stimulates pancreatic enzyme secretion and causes contraction of the gallbladder 
E)  none of these

Question 19

The intrinsic nerve plexuses innervate smooth muscle and exocrine gland cells but do not influence endocrine gland cells within the digestive system.

Accepted Answer

A) True 
 B)False

Question 20

Milk sugar is digested to

Accepted Answer

A)  glucose and fructose 
B)  glucose and galactose 
C)  sucrose and glucose 
D)  maltose 
E)  cellulose 
A)  glucose and fructose 
B)  glucose and galactose 
C)  sucrose and glucose 
D)  maltose 
E)  cellulose

Exam 16: A--The Digestive System

Intrinsic factor is

CCK causes relaxation of the sphincter of Oddi.

Which statement is incorrect?

How long does it take for an epithelial cell to migrate from the base of the villi to the tip?

Complete each of the following statments. The most potent stimulus for gastrin release is ____________________. Gastrin, in turn, is a powerful stimulus for ____________________ in the stomach. The PGA is directly inhibited from releasing gastrin by ____________________.

Which of the following are functions of aqueous NaHCO3 secreted by the pancreas into the duodenum?

The process of digestion starts as food enters the stomach.

Which of the following is an active proteolytic enzyme?

The typical coloration of the feces is due to

The pharyngoesophageal sphincter is normally closed and its main function is to prevent esophageal secretions from entering the pharynx during breathing.

Fat soluble vitamins

Which of the following factors is the most potent stimulus for inhibition of gastric motility?

Salivary secretion is

Vomiting is initiated by stimulation of chemoreceptors in the medulla.

The pyloric gland area of the stomach antrum secretes

Complete each of the following statments. Chylomicrons are large, coated droplets of ____________________.

Which statement regarding control of pancreatic secretion is correct?

Cholecystokinin

The intrinsic nerve plexuses innervate smooth muscle and exocrine gland cells but do not influence endocrine gland cells within the digestive system.

Milk sugar is digested to

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

A--The Central Nervous System

B--The Central Nervous System

A--The Peripheral Nervous System: Afferent Division; Special Senses

B--The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

A--Muscle Physiology

B--Muscle Physiology

A--Cardiac Physiology

B--Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

A--The Respiratory System

B--The Respiratory System

A--The Urinary System

B--The Urinary System

A--Fluid and Acid-Base Balance

B--Fluid and Acid-Base Balance

B--The Digestive System

Energy Balance and Temperature Regulation

A--Principles of Endocrinology: the Central Endocrine Glands

B--Principles of Endocrinology: the Central Endocrine Glands

A--The Peripheral Endocrine Glands

B--The Peripheral Endocrine Glands

A--The Reproductive System

B--The Reproductive System

Filters

Complete each of the following statments. The most potent stimulus for gastrin release is . Gastrin, in turn, is a powerful stimulus for in the stomach. The PGA is directly inhibited from releasing gastrin by .

Which of the following are functions of aqueous NaHCO₃ secreted by the pancreas into the duodenum?