In which of the following areas of the kidney does most of the reabsorption of water occur?
Bowman's capsule
Proximal convoluted tubules
Renal pelvis
Ascending loop of Henle
The Correct Answer is B
A. Bowman's capsule is the site of initial filtration in the kidney, where blood plasma is filtered into the nephron. However, it does not participate in the reabsorption of water.
B. The proximal convoluted tubules are where the majority of water, along with glucose, amino acids, and ions, is reabsorbed. This segment is crucial for maintaining fluid balance in the body.
C. The renal pelvis is a funnel-like structure that collects urine from the collecting ducts and channels it into the ureter for excretion. It does not play a role in reabsorption.
D. The ascending loop of Henle is primarily involved in the reabsorption of salts (sodium and chloride), but not water, as it is impermeable to water. Water reabsorption occurs in other parts of the nephron, such as the proximal convoluted tubule and the descending loop of Henle.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. A vesicle is involved in the transport of substances within or out of the cell via processes like endocytosis or exocytosis but does not directly permit ion passage across the membrane.
B. An enzyme catalyzes chemical reactions and is not directly involved in the transport of ions across the cell membrane.
C. A channel protein facilitates the passage of ions across the cell membrane, allowing specific ions to move in and out of the cell based on concentration gradients.
D. A lysosome is an organelle responsible for digesting and breaking down waste materials within the cell, not for ion transport across the membrane.
Correct Answer is D
Explanation
A. The production of breast milk is the function of the mammary glands, not the lacrimal gland.
B. The production of saliva is the function of the salivary glands, not the lacrimal gland.
C. The secretion of cerumen (earwax) is the function of the ceruminous glands, not the lacrimal gland.
D. The lacrimal glands are responsible for the secretion of tears, which help to lubricate and protect the surface of the eyes. This is the correct answer.
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