Question 1

The layer of loose connective tissue beneath the digestive epithelium is the

Accepted Answer

A)  lamina propria. 
B)  muscularis mucosae. 
C)  submucosa. 
D)  submucosal plexus. 
E)  myenteric plexus. 
A)  lamina propria. 
B)  muscularis mucosae. 
C)  submucosa. 
D)  submucosal plexus. 
E)  myenteric plexus. A

Question 2

What would be the nutritional consequence of excessive antacid use?

Accepted Answer

Antacids make the stomach pH higher than normal,which will interfere with protein digestion because the enzymes would not be as efficient.

Question 3

Match the following structures with the appropriate description.
-distal-most section of small intestine

Accepted Answer

A) appendix 
B) colon 
C) duodenum 
D) ileum 
E) jejunum 
A) appendix 
B) colon 
C) duodenum 
D) ileum 
E) jejunum D

Question 4

Which of the following events does NOT occur when you swallow?

Accepted Answer

A)  Respiration is inhibited. 
B)  The upper esophageal sphincter closes. 
C)  The glottis and epiglottis close. 
D)  The lower esophageal sphincter relaxes. 
A)  Respiration is inhibited. 
B)  The upper esophageal sphincter closes. 
C)  The glottis and epiglottis close. 
D)  The lower esophageal sphincter relaxes.

Question 5

The lamina propria and mucous epithelium are components of the

Accepted Answer

A)  serosa. 
B)  adventitia. 
C)  muscularis mucosa. 
D)  mucosa. 
E)  submucosa. 
A)  serosa. 
B)  adventitia. 
C)  muscularis mucosa. 
D)  mucosa. 
E)  submucosa.

Question 6

Vitamin ________ must be complexed with a protein called ________ to be absorbed from the small intestine.

Accepted Answer

The answer of Vitamin ________ must be complexed with a...

Question 7

Which of the following is the sequence of layers from the lumen to the outer wall of the digestive tract?

Accepted Answer

A)  serosa, submucosa, mucosa, muscularis externa 
B)  submucosa, mucosa, serosa, muscularis externa 
C)  mucosa, submucosa, serosa, muscularis externa 
D)  submucosa, muscularis externa, serosa, mucosa 
E)  mucosa, submucosa, muscularis externa, serosa 
A)  serosa, submucosa, mucosa, muscularis externa 
B)  submucosa, mucosa, serosa, muscularis externa 
C)  mucosa, submucosa, serosa, muscularis externa 
D)  submucosa, muscularis externa, serosa, mucosa 
E)  mucosa, submucosa, muscularis externa, serosa

Question 8

Mechanical digestion refers to

Accepted Answer

A)  the progressive dehydration of indigestible residue. 
B)  the input of food into the digestive tract. 
C)  the enzymatic breakdown of food. 
D)  the absorption of nutrients in the gut. 
E)  the effects of chewing, churning, and segmentation. 
A)  the progressive dehydration of indigestible residue. 
B)  the input of food into the digestive tract. 
C)  the enzymatic breakdown of food. 
D)  the absorption of nutrients in the gut. 
E)  the effects of chewing, churning, and segmentation.

Question 9

The ________ is a "housekeeping function" that sweeps food remnants and bacteria out of the upper GI tract and into the large intestine.

Accepted Answer

migrating

Question 10

Saliva is

Accepted Answer

A)  slightly acidic, with a pH of 6-7. 
B)  controlled by the autonomic nervous system. 
C)  stimulated by sympathetic innervation. 
D)  secreted from endocrine glands. 
E)  slightly acidic, with a pH of 6-7 and controlled by the autonomic nervous system. 
A)  slightly acidic, with a pH of 6-7. 
B)  controlled by the autonomic nervous system. 
C)  stimulated by sympathetic innervation. 
D)  secreted from endocrine glands. 
E)  slightly acidic, with a pH of 6-7 and controlled by the autonomic nervous system.

Question 11

The mucosa of the majority of the digestive tract contains simple columnar epithelium,while the esophagus and the anus have stratified squamous epithelium.Why is this the case? What purpose does each type of epithelium serve in the digestive tract?

Accepted Answer

Columnar epithelium is primarily respons

Question 12

An enzyme that will digest proteins into peptides is

Accepted Answer

A)  lipase. 
B)  amylase. 
C)  nuclease. 
D)  maltase. 
E)  trypsin. 
A)  lipase. 
B)  amylase. 
C)  nuclease. 
D)  maltase. 
E)  trypsin.

Question 13

In the body,80% of all lymphocytes,a type of immune system cell,are thought to be present in the

Accepted Answer

A)  small intestine. 
B)  large intestine. 
C)  appendix. 
D)  stomach. 
E)  mouth. 
A)  small intestine. 
B)  large intestine. 
C)  appendix. 
D)  stomach. 
E)  mouth.

Question 14

Which of the following statements is true about GI muscle contractions?

Accepted Answer

A)  Phasic contractions last only seconds and occur in the stomach and small intestine. 
B)  Tonic contractions are sustained for minutes and occur in the small intestine. 
C)  Cycles of smooth muscle contraction and relaxation are associated with fast wave potentials. 
D)  Contractions of the smooth muscle do not depend on calcium. 
E)  None of these statements are true. 
A)  Phasic contractions last only seconds and occur in the stomach and small intestine. 
B)  Tonic contractions are sustained for minutes and occur in the small intestine. 
C)  Cycles of smooth muscle contraction and relaxation are associated with fast wave potentials. 
D)  Contractions of the smooth muscle do not depend on calcium. 
E)  None of these statements are true.

Question 15

Cholesterol is absorbed without being digested into smaller pieces.How does this compare to absorption of carbohydrates and proteins? What characteristic of cholesterol suggests it would be transported by simple diffusion? What is the evidence that transport proteins are involved in cholesterol absorption? Does this discovery rule out transport by simple diffusion? Explain.

Accepted Answer

Carbohydrates are digested to monosaccha

Question 16

Eric has had trouble sleeping the last two nights and is currently experiencing heart burn which he attributes to the stress of being in finals week and eating too much pizza.His lab partner in Physiology class tells him he should take some diphenhydramine (Benadryl)before he goes to bed because that will help him sleep and his upset stomach.Is this a good suggestion or not.

Accepted Answer

While longstanding heartburn or insomnia

Question 17

In response to the arrival of acidic chyme in the duodenum,the blood levels of

Accepted Answer

A)  secretin rise. 
B)  cholecystokinin fall. 
C)  gastrin rise. 
D)  enterocrinin fall. 
E)  All of these answers are correct. 
A)  secretin rise. 
B)  cholecystokinin fall. 
C)  gastrin rise. 
D)  enterocrinin fall. 
E)  All of these answers are correct.

Question 18

Digestion of a carbohydrate results in large amounts of the monosaccharides glucose and galactose.This carbohydrate was probably

Accepted Answer

A)  sucrose. 
B)  maltose. 
C)  lactose. 
D)  cellulose. 
E)  glycogen. 
A)  sucrose. 
B)  maltose. 
C)  lactose. 
D)  cellulose. 
E)  glycogen.

Question 19

________ is intestinal gas produced by bacteria in the colon during the metabolism of undigestible carbohydrates.

Accepted Answer

The answer of ________ is intestinal gas produced by bacteria...

Question 20

Amylases,the enzymes used to digest carbohydrates,are secreted by

Accepted Answer

A)  salivary glands into the mouth only. 
B)  gastric glands into the stomach only. 
C)  the pancreas into the intestine only. 
D)  salivary glands into the mouth and gastric glands into the stomach. 
E)  salivary glands into the mouth and the pancreas into the intestine. 
A)  salivary glands into the mouth only. 
B)  gastric glands into the stomach only. 
C)  the pancreas into the intestine only. 
D)  salivary glands into the mouth and gastric glands into the stomach. 
E)  salivary glands into the mouth and the pancreas into the intestine.

Exam 21: The Digestive System

The layer of loose connective tissue beneath the digestive epithelium is the

What would be the nutritional consequence of excessive antacid use?

Match the following structures with the appropriate description. -distal-most section of small intestine

Which of the following events does NOT occur when you swallow?

The lamina propria and mucous epithelium are components of the

Vitamin ________ must be complexed with a protein called ________ to be absorbed from the small intestine.

Which of the following is the sequence of layers from the lumen to the outer wall of the digestive tract?

Mechanical digestion refers to

The ________ is a "housekeeping function" that sweeps food remnants and bacteria out of the upper GI tract and into the large intestine.

Saliva is

The mucosa of the majority of the digestive tract contains simple columnar epithelium,while the esophagus and the anus have stratified squamous epithelium.Why is this the case? What purpose does each type of epithelium serve in the digestive tract?

An enzyme that will digest proteins into peptides is

In the body,80% of all lymphocytes,a type of immune system cell,are thought to be present in the

Which of the following statements is true about GI muscle contractions?

In response to the arrival of acidic chyme in the duodenum,the blood levels of

Digestion of a carbohydrate results in large amounts of the monosaccharides glucose and galactose.This carbohydrate was probably

________ is intestinal gas produced by bacteria in the colon during the metabolism of undigestible carbohydrates.

Amylases,the enzymes used to digest carbohydrates,are secreted by

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters

Vitamin must be complexed with a protein called to be absorbed from the small intestine.