Question 1

Slow-wave potentials are always accompanied by contractile activity.

Accepted Answer

A) True 
 B)False

Question 2

If peristalsis in the esophagus is insufficient to carry an especially large bolus of food through the esophagus to the stomach, what happens to dislodge this trapped food?

Accepted Answer

A)  A secondary peristaltic wave is initiated by the swallowing center. 
B)  A secondary peristaltic wave is initiated by distention of the esophagus, mediated by the intrinsic nerve plexuses. 
C)  The food remains in the esophagus until the swallowing mechanism is voluntarily initiated once again. 
D)  Increased esophageal mucus secretion occurs to lubricate the stuck bolus so that it can slide to the stomach. 
E)  Food never becomes stuck in the esophagus because it is very distensible. 
A)  A secondary peristaltic wave is initiated by the swallowing center. 
B)  A secondary peristaltic wave is initiated by distention of the esophagus, mediated by the intrinsic nerve plexuses. 
C)  The food remains in the esophagus until the swallowing mechanism is voluntarily initiated once again. 
D)  Increased esophageal mucus secretion occurs to lubricate the stuck bolus so that it can slide to the stomach. 
E)  Food never becomes stuck in the esophagus because it is very distensible.

Question 3

The only function of chewing is to break food up into smaller pieces and soften it by mixing it with saliva to facilitate swallowing.

Accepted Answer

A) True 
 B)False

Question 4

The primary factor responsible for forward propulsion of chyme through the small intestine is mass movements.

Accepted Answer

A) True 
 B)False

Question 5

The rate of gastric emptying is influenced by factors both in the stomach and in the duodenum.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is absorbed by receptor mediated endocytosis in the terminal ileum?

Accepted Answer

A)  fatty acids and monoglycerides 
B)  bile 
C)  Vitamin B12 
D)  amino acids 
E)  all of these 
A)  fatty acids and monoglycerides 
B)  bile 
C)  Vitamin B12 
D)  amino acids 
E)  all of these

Question 7

The formation of a lipid emulsion

Accepted Answer

A)  facilitates digestion of fat by lipase 
B)  is accomplished by bile salts 
C)  takes place in the stomach 
D)  all of these 
E)  facilitates digestion of fat by lipase and is accomplished by bile salts 
A)  facilitates digestion of fat by lipase 
B)  is accomplished by bile salts 
C)  takes place in the stomach 
D)  all of these 
E)  facilitates digestion of fat by lipase and is accomplished by bile salts

Question 8

Sympathetic stimulation inhibits salivary secretion.

Accepted Answer

A) True 
 B)False

Question 9

Haustral contractions propel the feces one-third to three-quarters the length of the colon in a few seconds.

Accepted Answer

A) True 
 B)False

Question 10

Which statement is correct?

Accepted Answer

A)  The colon has as much absorptive capacity as the small intestine. 
B)  The final stages of carbohydrate and protein digestion occur in the colon. 
C)  Colonic movements are slower than movements in the small intestine. 
D)  The colon has as much absorptive capacity as the small intestine, and colonic movements are slower than movements in the small intestine 
E)  all of these 
A)  The colon has as much absorptive capacity as the small intestine. 
B)  The final stages of carbohydrate and protein digestion occur in the colon. 
C)  Colonic movements are slower than movements in the small intestine. 
D)  The colon has as much absorptive capacity as the small intestine, and colonic movements are slower than movements in the small intestine 
E)  all of these

Question 11

Sodium can be absorbed both actively and passively.

Accepted Answer

A) True 
 B)False

Question 12

Vomiting is caused by reverse peristalsis.

Accepted Answer

A) True 
 B)False

Question 13

Distention of the stomach

Accepted Answer

A)  triggers the gastrocolic reflex 
B)  encourages motility in the intestines 
C)  results in salivation 
D)  triggers the gastrocolic reflex and encourages motility in the intestines 
E)  encourages motility in the intestines and results in salivation 
A)  triggers the gastrocolic reflex 
B)  encourages motility in the intestines 
C)  results in salivation 
D)  triggers the gastrocolic reflex and encourages motility in the intestines 
E)  encourages motility in the intestines and results in salivation

Question 14

Complete each of the following statments.
The pancreatic ____________________ secretion neutralizes acidic gastric contents in the duodenal lumen.

Accepted Answer

The answer of Complete each of the following statments.
The pancreatic...

Question 15

The defecation reflex

Accepted Answer

A)  is initiated when mass movements force fecal material into the rectum, stimulating stretch receptors in the rectal wall 
B)  involves relaxation of the internal anal sphincter 
C)  involves contraction of the sigmoid colon and rectum 
D)  can be overridden by voluntary contraction of the external anal sphincter 
E)  all of these 
A)  is initiated when mass movements force fecal material into the rectum, stimulating stretch receptors in the rectal wall 
B)  involves relaxation of the internal anal sphincter 
C)  involves contraction of the sigmoid colon and rectum 
D)  can be overridden by voluntary contraction of the external anal sphincter 
E)  all of these

Question 16

Which of the following organs is not a digestive tract organ?

Accepted Answer

A)  esophagus 
B)  stomach 
C)  pancreas 
D)  small intestine 
E)  large intestine 
A)  esophagus 
B)  stomach 
C)  pancreas 
D)  small intestine 
E)  large intestine

Exam 16: A--The Digestive System

Slow-wave potentials are always accompanied by contractile activity.

If peristalsis in the esophagus is insufficient to carry an especially large bolus of food through the esophagus to the stomach, what happens to dislodge this trapped food?

The only function of chewing is to break food up into smaller pieces and soften it by mixing it with saliva to facilitate swallowing.

The primary factor responsible for forward propulsion of chyme through the small intestine is mass movements.

The rate of gastric emptying is influenced by factors both in the stomach and in the duodenum.

Which of the following is absorbed by receptor mediated endocytosis in the terminal ileum?

The formation of a lipid emulsion

Sympathetic stimulation inhibits salivary secretion.

Haustral contractions propel the feces one-third to three-quarters the length of the colon in a few seconds.

Which statement is correct?

Sodium can be absorbed both actively and passively.

Vomiting is caused by reverse peristalsis.

Distention of the stomach

Complete each of the following statments. The pancreatic ____________________ secretion neutralizes acidic gastric contents in the duodenal lumen.

The defecation reflex

Which of the following organs is not a digestive tract organ?

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

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