The intestinal hormone cholecystokinin:
causes the pancreas to increase exocrine secretions high in enzyme content.
opposes the influence of gastrin on gastric parietal cells.
stimulates the contraction of the gallbladder.
does all of the above.
The Correct Answer is D
A. Causes the pancreas to increase exocrine secretions high in enzyme content: CCK stimulates pancreatic acinar cells to release digestive enzymes.
B. Opposes the influence of gastrin on gastric parietal cells: CCK helps inhibit gastric emptying and acid secretion to allow the small intestine time to process fats.
C. Stimulates the contraction of the gallbladder: This is the most well-known function, which pushes bile into the duodenum to emulsify fats.
D. Does all of the above: All three statements accurately describe the multi-faceted role of CCK in digestion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. increased residual volume: Excessive fluid in the pleural space (pleural effusion) compresses the lung, making it harder to keep air inside, usually not increasing the residual volume.
B. decreased vital capacity: The fluid occupies space in the chest cavity and prevents the lung from fully expanding, the maximum amount of air a person can inhale and exhale (vital capacity) is reduced.
C. increased functional reserve volume: Lung compression typically reduces all functional volumes rather than increasing them.
D. decreased tidal volume: While tidal volume might eventually decrease, the primary clinical indicator of restrictive lung pressure from fluid is the decrease in total Vital Capacity.
Correct Answer is C
Explanation
A. hemoglobin: This is the iron-containing protein within the cell that carries oxygen, not the cell itself.
B. osteons: These are the structural units of compact bone, unrelated to blood cell production.
C. erythroblasts: These are the immature, nucleated cells in the red bone marrow that eventually synthesize hemoglobin and eject their nuclei to become reticulocytes and then mature erythrocytes.
D. hematopoietic stem cells: While all blood cells originate here, the specific maturation sequence for red blood cells specifically identifies erythroblasts as the intermediate nucleated stage.
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