The esophagus is a muscular tube that:
Stores undigested pieces of food
Transports food from the pharynx to the stomach
Absorbs nutrients
Breaks down proteins
The Correct Answer is B
A. Stores undigested pieces of food: The stomach, not the esophagus, is responsible for storing food temporarily.
B. Transports food from the pharynx to the stomach: The esophagus is a muscular tube that uses peristalsis to move food from the pharynx to the stomach.
C. Absorbs nutrients: Nutrient absorption occurs mainly in the small intestine, not the esophagus.
D. Breaks down proteins: Protein digestion begins in the stomach via pepsin, not in the esophagus.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Urine contains glucose: Glucose is not normally present in urine. Its presence typically indicates hyperglycemia, such as in uncontrolled diabetes mellitus.
B. Urine may contain drugs: Many drugs and their metabolites are excreted in the urine, which is why urine drug testing is possible.
C. Urine contains water: Water is the main component of urine, making up about 95% of its volume.
D. Urine contains uric acid: Uric acid is a normal waste product of purine metabolism, excreted by the kidneys.
Correct Answer is B
Explanation
A. Aldosterone: Aldosterone is secreted by the adrenal glands, and it regulates sodium and water balance, not in response to low oxygen.
B. Erythropoietin: The kidneys secrete erythropoietin in response to hypoxia to stimulate the production of red blood cells in the bone marrow.
C. Converting enzyme: Refers to angiotensin-converting enzyme (ACE), which is found in the lungs and converts angiotensin I to II—not secreted by kidneys in response to hypoxia.
D. Renin: Renin is secreted by the kidneys in response to low blood pressure or sodium, not oxygen deficiency.
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