A&p II Digestive System
- 1.All of the following are considered organs of the gastrointestinal tract except
- A.
Pharynx
- B.
Small intestine
- C.
Gallbladder
- D.
Stomach
- E.
Esophagus
- 2.The myenteric plexus
- A.
Controls the contractile strength and frequency of contraction of the muscularis
- B.
Supplies the secretory cells of the mucosal epithelium
- C.
Contains sensory neurons which function as chemoreceptors
- D.
Regulates secretional gastrointestinal organs
- E.
Supplies the mucosal epithelium
- 3.The mesentery
- A.
Binds the transverse and sigmoid colon to the posterior abdominal wall
- B.
Attaches the liver to the anterior abdominal wall and diaphragm
- C.
Drapes over the transverse colon and coils of the small intestine
- D.
Extends from the posterior wall to wrap around the small intestine
- E.
Suspends the mucosal epithelium
- 4.The pharynx is part of both the __________ and ___________ organ systems.
- A.
Digestive and muscular
- B.
Digestive and respiratory
- C.
Respiratory and muscular
- D.
Digestive and endocrine
- E.
Digestive and skeletal
- 5.Gastric lipase
- A.
Is the result of activation of lingual lipase in the stomach
- B.
Functions best at an alkaline pH
- C.
Is most active in infants
- D.
Synthesizes triglycerides from fatty acids and monoglycerides
- E.
Is much more effective than lingual lipase or pancreatic lipase
- 6.Pancreatic juice does all of the following except
- A.
Buffer gastric juice
- B.
Provide protein-digesting enzymes in inactive form
- C.
Provide starch-digesting enzymes
- D.
Provide glucagon
- E.
Stop the action of pepsin
- 7.You absolutely love plain, unsweetened whipped cream and have eaten a cup of it by itself. Which of the following enzymes would be most useful in digesting this snack of questionable dietary value?
- A.
Pancreatic amylase
- B.
Aminopeptidase
- C.
Pancreatic lipase
- D.
Pepsin
- E.
Deoxyribonuclease
- 8.In order from the small intestine to the anus, the major regions of the lare intestine are
- A.
Ascending colon-transverse colon-descending colon-cecum-rectum-anal canal
- B.
Cecum-ascending canal-transverse colon-descending colon-rectum-anal canal
- C.
Ascending colon-transverse colon-descending colon-cecum-anal canal-rectum
- D.
Cecum-ascending colon-transverse colon-descending colon-anal canal-rectum
- E.
Ascending colon-transverse colon-descending colon-anal canal-cecum-rectum
- 9.The enterogastric reflex
- A.
Is stimulated by the presence of chyme in the stomach
- B.
Is stimulated by the presence of chyme in the duodenum
- C.
Results in decreased contraction of the pyloric sphincter
- D.
Increases gastric emptying
- E.
Is the result of parasympathetic stimulation
- 10.If glucose is not immediately needed for ATP production _______________ may occur.
- A.
Glycogenesis
- B.
Glycogenolysis
- C.
Gluconeogenesis
- D.
Glycolysis
- E.
Glucolysis
- 11.A high level of LDL accompanied by a low level of HDL is considered
- A.
Beneficial because LDL can deposit triglycerides in adipose cells for storage until the triglycerides are needed for cellular metabolism
- B.
Beneficial because LDL help remove cholesterol from the blood
- C.
Beneficial because LDL are required for insertion of cholesterol into cell membranes
- D.
Deleterious because HDL prevent accumulation of cholesterol in the blood
- E.
Deleterious because LDL remove too much cholesterol from the blood
- 12.Which of the following statements about the process of deamination is false?
- A.
Required for protein anabolism
- B.
Required for oxidation of amino acids in the Krebs cycle
- C.
Removes amino groups from amino acids
- D.
Occurs in hepatocytes
- E.
Results in the formation of ammonia
- 13.Amino Acids may
- A.
Be converted into other amino acids
- B.
Be converted into glucose
- C.
Be converted into fatty acids
- D.
All of the above
- E.
None of the above
- 14.For adequate absorption, all of the folowing require ingestion with other lipids except Vitamin
- A.
A
- B.
C
- C.
D
- D.
E
- E.
K
- 15.Blood pH may be slightly elevated during digestion of a large meal because there is
- A.
Active transport hydrogen ions into the blood from the stomach
- B.
Active transport of hydrogen ions into the stomach from the blood
- C.
Chloride ion diffusion into the stomach from the blood
- D.
Potassium ion diffusion into the stomach from the blood
- E.
Loss of bicarbonate ions from the parietal cells into the blood
- 16.Which of the following enzymes is not matched correctly with its substrate
- A.
Pancreatic amylase: starch
- B.
Trypsin: oligo- and disaccharides
- C.
Carboxypeptidase: proteins
- D.
Pancreatic lipase: triglycerides
- E.
Ribonuclease and deoxyribonuclease: nucleic acids
- 17.The enteroendocrine cells of the small intestine secrete
- A.
Lysozyme
- B.
Secretin, CCK and GIP
- C.
Alkaline mucus
- D.
Brush-border enzymes
- E.
Chylomicrons
- 18.Insulin is needed for carbohdrate metabolism because it
- A.
Is required for the breakdown of complex carbohydrates
- B.
Transports glucose in the bloodstrea
- C.
Acts as a glucose receptor molecule on the cell surface
- D.
Is part of an active transport mechanism required for entry of glucose into cells
- E.
Increases the insertion of a particular type of glucose transport protein into the cell membrane
- 19.Which of the following places the evens of glucose catabolim in the correct oder?
- A.
Glycolysis, formation of acetyl coA, Krebs cycle, electron transport chain reactions
- B.
Glycolsis, Krebs cycle, fomation of acetyl coA, electron transport chin reactions
- C.
Glycolysis anaerobic respiration, Krebs cycle, electron transport of chain reactions
- D.
Glycolysis, Krebs cycle, anaerobic respiration, electron transport of chain reactions
- E.
Formation of acetyl coA, glycolysis, electron transport chain reactions
- 20.Vitamins may do which of the following?
- A.
Serve as coenzymes
- B.
Provide energy
- C.
Serve as building materials within the body
- D.
A and B
- E.
All of the above
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