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 D
Explanation
A. Causes Na⁺ excretion: Aldosterone promotes sodium reabsorption, not excretion, to increase blood volume and pressure.
B. Depletes blood volume: Aldosterone increases blood volume by retaining sodium and water.
C. Causes K⁺ reabsorption: Aldosterone promotes potassium excretion, not reabsorption.
D. Causes Na⁺ and water reabsorption: Aldosterone acts on the renal tubules to reabsorb sodium, which draws water back into circulation, increasing blood volume.
Correct Answer is ["A","C","E","F"]
Explanation
A. Regulate blood volume: Kidneys regulate fluid balance by adjusting urine output, influencing blood volume.
B. Excrete solid waste: Kidneys excrete liquid waste (urea, creatinine), not solid waste; the GI tract handles solids.
C. Role in regulation of blood pressure: Via the renin-angiotensin-aldosterone system (RAAS), kidneys influence vascular resistance and fluid volume.
D. Regulate body temperature: Thermoregulation is managed by the hypothalamus and skin, not the kidneys.
E. Regulate electrolyte content of blood: Kidneys regulate levels of sodium, potassium, calcium, and phosphate in the blood.
F. Role in RBC production: By releasing erythropoietin, kidneys stimulate RBC production in the bone marrow.
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