Which part of the nephron is primarily responsible for reabsorbing water and nutrients?
Collecting duct
Glomerulus
Loop of Henle
Proximal convoluted tubule
The Correct Answer is D
A. Collecting duct: This structure is primarily involved in the final concentration of urine and the reabsorption of water under the influence of ADH.
B. Glomerulus: The glomerulus is responsible for the filtration of blood, not the reabsorption of nutrients.
C. Loop of Henle: The Loop of Henle is primarily responsible for creating an osmotic gradient to concentrate urine, mostly involving water and salt.
D. Proximal convoluted tubule: The PCT is the "workhorse" of the nephron; it reabsorbs nearly 100% of glucose and amino acids, and about 65% of water and electrolytes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Vitamin B12 is stored in excess in the liver: Without intrinsic factor, the vitamin cannot reach the liver for storage.
B. Vitamin B12 is not absorbed and can lead to deficiency: Intrinsic factor is the "key" that allows Vitamin B12 to be absorbed in the ileum; without it, the vitamin passes through the GI tract and is excreted in feces.
C. Vitamin B12 is converted to its inactive form: The vitamin is not chemically inactivated; it simply remains in the lumen of the intestine because it cannot be transported across the membrane.
D. Vitamin B12 is excreted through the respiratory system: Vitamins are not gases and cannot be excreted via the lungs.
Correct Answer is ["10"]
Explanation
Desired /Available× Volume = x
200mg/100mg×5ml=10ml
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