What increases the surface area in the stomach?
Rugae
Microvilli
Peritoneum
Muscularis
The Correct Answer is A
A. Rugae: The rugae are folds in the stomach lining that expand when the stomach fills with food, increasing surface area for digestion.
B. Microvilli: Microvilli increase surface area in the small intestine, not the stomach.
C. Peritoneum: The peritoneum is a membrane surrounding the abdominal cavity, not involved in surface area expansion of the stomach.
D. Muscularis: The muscularis is the muscle layer responsible for stomach contractions but does not increase surface area.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Glomerulus: The glomerulus is a high-pressure capillary bed in the nephron where filtration of blood occurs.
B. Bowman's capsule: This is the cup-shaped structure surrounding the glomerulus, not a capillary bed.
C. Vasa recta: These are capillaries surrounding the loop of Henle, involved in the reabsorption process, not filtration.
D. Macula densa: This is a group of specialized cells in the distal convoluted tubule that sense sodium concentration and affect glomerular filtration rate, but it is not a capillary bed.
Correct Answer is B
Explanation
A. Uvula: The uvula is a small fleshy extension that helps with speech and prevents food from entering the nasal cavity but is not a lymphoid structure.
B. Palatine tonsils: The palatine tonsils are clusters of lymphoid tissue located at the back of the throat, protecting the pharynx from infections.
C. Hard palate: The hard palate forms the roof of the mouth and aids in chewing but has no immune function.
D. Esophageal sphincter: This is a muscular ring at the junction of the esophagus and stomach, not involved in immune defense.
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