Answer: Peritubular capillaries.
- A Peritubular capillaries
- B Pulmonary capillaries
- C Hepatic sinusoids
- D Lymphatic capillaries
Correct answer: A. Peritubular capillaries
Explanation: Blood leaving the glomerulus flows into the peritubular capillaries, which surround the tubule for reabsorption and secretion.
Filtrate flows through four functionally distinct stages of the nephron: Bowman's capsule filters blood, the PCT reabsorbs most useful substances unconditionally, the Loop of Henle builds a concentration gradient via counter-current exchange, the DCT secretes selected substances, and the collecting duct performs the final ADH-controlled water reabsorption.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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