In what digestive system structure does most of the digestion and absorption take place?
Stomach
Duodenum/proximal jejunum
Ascending colon
Transverse colon
The Correct Answer is B
A. Stomach: The stomach primarily functions in mechanical digestion and protein breakdown, but most absorption does not occur here.
B. Duodenum/proximal jejunum: These regions of the small intestine are responsible for majority of digestion and nutrient absorption, including fats, carbohydrates, and proteins.
C. Ascending colon: This is part of the large intestine, mainly involved in water and electrolyte absorption, not digestion.
D. Transverse colon: Like the ascending colon, this structure primarily functions in water absorption and feces formation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Renal capsule: This is the outer protective covering of the kidney and does not form urine.
B. Nephron: The nephron is the functional unit of the kidney that performs filtration, reabsorption, and secretion to form urine.
C. Renal pyramid: These structures contain parts of the nephron and collecting ducts but do not themselves make urine.
D. Ureter: The ureter transports urine from the kidneys to the bladder; it does not produce urine.
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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