What happens when food reaches the stomach?
Nothing, it's just a pass through to the next structure
Gastric juices mix with the food and the stomach muscles squeeze it
The food moves quickly into the small intestine
The food is completely digested and is absorbed by tiny blood vessels in the walls of the stomach
The Correct Answer is B
A. Nothing, it's just a pass through to the next structure: The stomach plays a critical role in digestion through mixing and secretion of gastric juices.
B. Gastric juices mix with the food and the stomach muscles squeeze it: This process forms chyme through mechanical (squeezing) and chemical (acid/enzymes) digestion.
C. The food moves quickly into the small intestine: Food stays in the stomach for a period of time for processing before gradually passing into the small intestine.
D. The food is completely digested and is absorbed by tiny blood vessels in the walls of the stomach: Most digestion and nutrient absorption occur in the small intestine, not the stomach.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is C
Explanation
A. Mouth, pharynx, large intestine, small intestine: The small intestine comes before the large intestine in the digestive tract.
B. Mouth, esophagus, stomach, pharynx, small intestine: The pharynx comes before the esophagus, not after.
C. Mouth, pharynx, esophagus, stomach, small intestine: This is the correct order of food movement through the upper GI tract.
D. Mouth, pharynx, stomach, esophagus, anus: The esophagus precedes the stomach, and the anus is the final structure after the large intestine.
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