Question at position 7 The distal convoluted tubule (DCT) has more microvilli on the apical surface compared to the proximal convoluted tubule (PCT).TrueFalse单项选择题
A
True
B
False

Question

Question at position 7 The distal convoluted tubule (DCT) has more microvilli on the apical surface compared to the proximal convoluted tubule (PCT).TrueFalse

BlackTom AI · Accepted Answer

The question asks to evaluate whether the distal convoluted tubule (DCT) has more microvilli on the apical surface than the proximal convoluted tubule (PCT).
Option 1: True. This would claim that the DCT has more apical microvilli than the PCT. In reality, the PCT is characterized by a prominent brush border composed of densely packed microvilli to maximize reabsorption of water, ions, and nutrients. The DCT, in contrast, has a much shorter apical microvilli surface area and appears as a simpler cuboidal epithelium with relatively fewer microvilli. Therefore this statement misstates the relative microvilli abundance.
Option 2: False. This option correctly asserts that the DCT does not have more microvilli than the PCT. The functional emphasis of the PCT on high-volume reabsorption is supported by its extensive microvilli, whereas the DCT plays a different role (fine-tuning reabsorption and secretion) and does not require a large brush border. The factual mismatch in Option 1 makes Option 2 the accurate response.
In summary, the claim that the DCT has more apical microvilli than the PCT is incorrect because the PCT possesses a prominent brush border with many microvilli, while the DCT has comparatively fewer.

Question at position 7 The distal convoluted tubule (DCT) has more microvilli on the apical surface compared to the proximal convoluted tubule (PCT).TrueFalse单项选择题

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Question at position 25 Filtered fluid from Bowman’s capsule flows directly into the proximal convoluted tubule (PCT).TrueFalse

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