- A Reabsorption of most filtered water along the tubules and collecting duct
- B Secretion of extra water into the filtrate by the tubules according to most studies
- C Filtration of plasma proteins at the glomerulus under usual circumstances
- D A rise in glomerular filtration rate during the day in the majority of documented cases
Correct answer: A. Reabsorption of most filtered water along the tubules and collecting duct
Explanation: About 99% of the glomerular filtrate is reabsorbed along the tubules and collecting duct, mainly as water, concentrating the small remaining volume into urine.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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