Question 1

Salivary amylase starts the breakdown of proteins in the mouth.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following statements best explains the reason why pepsin does not digest the proteins found in the stomach's own cells?

Accepted Answer

A) Pepsin can only recognize and digest proteins in food. 
B) Pepsin is released in an inactive form that is then activated by HCl in the stomach lumen. 
C) Pepsin is released in an inactive form that is then activated by enterokinsase in the stomach lumen. 
D) Pepsin digests starches not proteins. 
E) Pepsin is not active until it reaches the alkaline pH conditions of the small intestine. 
A) Pepsin can only recognize and digest proteins in food. 
B) Pepsin is released in an inactive form that is then activated by HCl in the stomach lumen. 
C) Pepsin is released in an inactive form that is then activated by enterokinsase in the stomach lumen. 
D) Pepsin digests starches not proteins. 
E) Pepsin is not active until it reaches the alkaline pH conditions of the small intestine. B

Question 3

Which of the following is NOT an enzyme used to digest carbohydrates?

Accepted Answer

A) pancreatic amylase 
B) salivary amylase 
C) maltase 
D) enterokinase 
E) lactase 
A) pancreatic amylase 
B) salivary amylase 
C) maltase 
D) enterokinase 
E) lactase D

Question 4

Which of the following digestion products are absorbed into the lacteals found within the villi?

Accepted Answer

A) monosaccharides 
B) amino acids 
C) tripeptides 
D) nucleic acids 
E) chylomicrons 
A) monosaccharides 
B) amino acids 
C) tripeptides 
D) nucleic acids 
E) chylomicrons

Question 5

Deglutition involves the movement of food from the mouth to the stomach.

Accepted Answer

A) True 
 B)False

Question 6

Which of the labeled absorptive processes in the figure occur by secondary active transport with H+?

Accepted Answer

A) A only 
B) A, C 
C) A, C, D 
D) D only 
E) E, F 
A) A only 
B) A, C 
C) A, C, D 
D) D only 
E) E, F

Question 7

The greater omentum contains many lymph nodes that supply macrophages and plasma cells for fighting GI tract infections.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is NOT a protein-digesting enzyme?

Accepted Answer

A) trypsin 
B) chymotrypsin 
C) carboxypeptidase 
D) amylase 
E) pepsin 
A) trypsin 
B) chymotrypsin 
C) carboxypeptidase 
D) amylase 
E) pepsin

Question 9

The greater omentum is part of the

Accepted Answer

A) mucosa 
B) pleural membranes 
C) mesentery 
D) peritoneum 
E) large intestine 
A) mucosa 
B) pleural membranes 
C) mesentery 
D) peritoneum 
E) large intestine

Question 10

Many things can stimulate nausea including local irritation of the GI tract, overexertion, and various drugs or medications.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is NOT a common digestive system change associated with aging?

Accepted Answer

A) loss of taste 
B) increased incidence of duodenal ulcers 
C) increased incidence of constipation 
D) increased digestive and absorptive capacity of the small intestine 
E) increased incidence of periodontal disease 
A) loss of taste 
B) increased incidence of duodenal ulcers 
C) increased incidence of constipation 
D) increased digestive and absorptive capacity of the small intestine 
E) increased incidence of periodontal disease

Question 12

Which of the following structures associated with the tongue contains the taste buds?

Accepted Answer

A) papillae 
B) uvula 
C) lingual tonsils 
D) lingual lipase 
E) lingual frenulum 
A) papillae 
B) uvula 
C) lingual tonsils 
D) lingual lipase 
E) lingual frenulum

Question 13

The presence of chyme in the duodenum slows gastric emptying.

Accepted Answer

A) True 
 B)False

Question 14

The appendix is attached to the

Accepted Answer

A) cecum 
B) ileum 
C) ascending colon 
D) descending colon 
E) rectum 
A) cecum 
B) ileum 
C) ascending colon 
D) descending colon 
E) rectum

Question 15

The hormone secreted by intestinal glands that inhibits gastric emptying is

Accepted Answer

A) ghrelin 
B) gastrin 
C) secretin 
D) cholecystokinin 
E) enterokinase 
A) ghrelin 
B) gastrin 
C) secretin 
D) cholecystokinin 
E) enterokinase

Question 16

Most digested nutrients are absorbed into blood capillaries in the small intestine except fats, which are packaged into chylomicrons and absorbed into the lymphatic system.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following paths are followed by nutrient-rich blood entering the liver through the hepatic portal vein?

Accepted Answer

A) hepatic portal vein - hepatic sinusoid - bile canaliculus - central vein - hepatic vein 
B) hepatic portal vein - hepatic sinusoid - central vein - hepatic vein 
C) hepatic portal vein - hepatic artery - hepatic sinusoid - central vein - hepatic vein 
D) hepatic portal vein - bile canaliculus - central vein - hepatic vein 
E) hepatic portal vein - central vein - hepatic sinusoid - hepatic vein 
A) hepatic portal vein - hepatic sinusoid - bile canaliculus - central vein - hepatic vein 
B) hepatic portal vein - hepatic sinusoid - central vein - hepatic vein 
C) hepatic portal vein - hepatic artery - hepatic sinusoid - central vein - hepatic vein 
D) hepatic portal vein - bile canaliculus - central vein - hepatic vein 
E) hepatic portal vein - central vein - hepatic sinusoid - hepatic vein

Question 18

Briefly describe the absorption of triglycerides in the small intestine.

Accepted Answer

Fatty acids and monoglycerides derived f

Question 19

The absorption of fructose across the microvillar surface of intestinal epithelial cells, marked B in the figure, occurs by

Accepted Answer

A) simple diffusion 
B) facilitated diffusion 
C) secondary active transport with Na+ 
D) secondary active transport with H+ 
E) primary active transport 
A) simple diffusion 
B) facilitated diffusion 
C) secondary active transport with Na+ 
D) secondary active transport with H+ 
E) primary active transport

Question 20

Most of the nutrients have been absorbed from the chyme by the time it reaches the

Accepted Answer

A) cardiac region of stomach 
B) duodenum 
C) jejunum 
D) ascending colon 
E) pyloric region of stomach 
A) cardiac region of stomach 
B) duodenum 
C) jejunum 
D) ascending colon 
E) pyloric region of stomach

Exam 19: The Digestive System

Salivary amylase starts the breakdown of proteins in the mouth.

Which of the following statements best explains the reason why pepsin does not digest the proteins found in the stomach's own cells?

Which of the following is NOT an enzyme used to digest carbohydrates?

Which of the following digestion products are absorbed into the lacteals found within the villi?

Deglutition involves the movement of food from the mouth to the stomach.

Which of the labeled absorptive processes in the figure occur by secondary active transport with H+?

The greater omentum contains many lymph nodes that supply macrophages and plasma cells for fighting GI tract infections.

Which of the following is NOT a protein-digesting enzyme?

The greater omentum is part of the

Many things can stimulate nausea including local irritation of the GI tract, overexertion, and various drugs or medications.

Which of the following is NOT a common digestive system change associated with aging?

Which of the following structures associated with the tongue contains the taste buds?

The presence of chyme in the duodenum slows gastric emptying.

The appendix is attached to the

The hormone secreted by intestinal glands that inhibits gastric emptying is

Most digested nutrients are absorbed into blood capillaries in the small intestine except fats, which are packaged into chylomicrons and absorbed into the lymphatic system.

Which of the following paths are followed by nutrient-rich blood entering the liver through the hepatic portal vein?

Briefly describe the absorption of triglycerides in the small intestine.

The absorption of fructose across the microvillar surface of intestinal epithelial cells, marked B in the figure, occurs by

Most of the nutrients have been absorbed from the chyme by the time it reaches the

Organization of the Human Body

Introductory Chemistry

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

The Muscular System

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

Development and Inheritance

Filters

Which of the labeled absorptive processes in the figure occur by secondary active transport with H⁺?