Physiology Final Exam Questions With Complete Solutions

Physiology Final Exam Questions With
Complete Solutions

Approximately 60% of CO2 is carried through the bloodstream____
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A: As carboxyhemoglobin
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B: Physically dissolved
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C: Bound to O2
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D: Bound to hemoglobin
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E: As bicarbonate - CORRECT ANSWER✔✔-E
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Hyperventilation of the lungs results in elevated blood pH levels, called
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respiratory alkalosis. This happens because of:
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A: An excessive loss of CO2 from the blood
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B: A decreased pCO2 in the blood
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C: An enhanced activity of erthroycyte carbonic anydrase
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D: All of the above
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E: A and B - CORRECT ANSWER✔✔-A
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Where do peripheral chemoreceptors monitor oxygen and/or carbon
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dioxide levels of the blood stream?
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,A: Pons of the brain
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B: Carotid artieris
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C: Lung capillaries
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D: Aorta
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E: B and D - CORRECT ANSWER✔✔-E
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Which of the following greatly enhances the conversion of gaseous CO2
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into HCO3- in muscle tissue?
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A: Carbonic anhydrase activity in RBCs
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B: Carbonic anhydrase activity in pancreatic duct cells
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C: Carbonic anhydrase activity in the blood plasma
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D: Carbonic anhydrase in lung alveoli
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E: Carbonic anhydrase activity in parietal cells of the stomach - CORRECT
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ANSWER✔✔-A
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What are the four basic digestive processes?
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A: Motility, secretion, digestion, and absorption
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B: Motility, absorption, transporting, and defecating
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C: Physical, chemical, motility, and absorption
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D: Chewing, absorbing, transporting, and energy storage
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E: Chewing, swallowing, absorbing, and defecating - CORRECT
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ANSWER✔✔-A

,The hormone that stimulates the secretion of HCl by gastric parietal
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cells is: |




A: Motilin from M-cells
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B: Gastrin from gastric G-cells
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C: Secretin from duodenal S-cells
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D: Somatostatin
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E: Cholecystokinin (CCK) from the duodenal C-cells - CORRECT
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ANSWER✔✔-B


Pepsinogen, secreted by gastric chief cells, is the inactive precursor for
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the enzyme pepsin. Production of pepsin from pepsinogen is enhanced
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by
A: HCl
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B: Pepsin (autocatalytic)
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C: Gastrin
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D: Cholecystokinin (CCK)
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E: A and B - CORRECT ANSWER✔✔-E
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Gastrin is secreted by G-cells in the antrum of the stomach in response
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to:
A: Sympathetic stimulation
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, B: HCl acid secreted into the stomach
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C: Parasympathetic stimulation
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D: Pepsin secretion from chief cells
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E: Bicarbonate in blood plasma - CORRECT ANSWER✔✔-C
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Parietal cell secretion is stimulated by which of the following chemical
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A: Interleukin
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B: Cholecystokinin
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C: Histone
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D: Cholesterol
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E: Histamine - CORRECT ANSWER✔✔-E
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Which of the following processes in gastric secretion is termed
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autocatalysis?
A: The stimulation of HCl secretion by gastrin
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B: The conversion of pepsinogen into pepsin by HCl
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C: The conversion of pepsinogen into pepsin by pepsin
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D: The stimulation of gastrin secretion by vagal input
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E: The buffering of H+ by bicarbonate - CORRECT ANSWER✔✔-C
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HCl production in gastric parietal cells generates bicarbonate. What
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prevents the cytosol of these cells to become too alkaline? Bicarbonate
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