The stomach can expand up to eighty times its empty volume partly due to _______ in its walls.
Microvilli
Plica circularis
Haustra
Rugae
The Correct Answer is D
A. Microvilli: Microvilli are tiny apical membrane projections that greatly increase surface area for absorption (mainly in the small intestine), not responsible for stomach expansion.
B. Plica circularis: Plicae circularis (circular folds) are permanent folds of the small intestine mucosa that aid absorption, not found in the stomach.
C. Haustra: Haustra are sacculations of the large intestine (colon), not structures of the stomach.
D. Rugae: Rugae are the longitudinal mucosal folds in the stomach wall that allow the stomach to stretch and expand as it fills .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Muscularis:The muscularis is the smooth muscle layer responsible for peristalsis/segmentation; it contains muscle, not the primary capillary/lymphatic beds for nutrient absorption.
B. Mucosal epithelium: The epithelial layer faces the lumen and absorbs nutrients at the cell surface, but the transport capillaries/lymphatics lie deeper than the epithelium.
C. Serosa: The serosa is the outer connective tissue covering of the gut -it does not contain the nutrient capillaries and lacteals.
D. Lamina propria: The lamina propria (a connective tissue layer within the mucosa) contains blood capillaries and lymphatic lacteals that transport absorbed nutrients.
Correct Answer is B
Explanation
A. Calyx, nephron, collecting duct, urinary bladder, renal pelvis, ureter, urethra: Sequence is wrong -filtrate is formed in nephron, flows into collecting duct, then into calyx → renal pelvis → ureter → bladder → urethra.
B. Nephron, collecting duct, calyx, renal pelvis, ureter, urinary bladder, urethra: Urine forms in nephron → drains into collecting duct → minor/major calyces → renal pelvis → ureter → urinary bladder → urethra for elimination.
C. Nephron, renal pelvis, collecting duct, calyx, urinary bladder, urethra, ureter:Renal pelvis and calyx order is swapped relative to collecting duct; ureter/bladder order is wrong.
D. Collecting duct, nephron, renal pelvis, calyx, urinary bladder, ureter, urethra:Collecting duct follows the nephron (not precedes it); calyx and pelvis ordering is
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