Question at position 28 The collecting ducts are continuous with the distal convoluted tubule but are not technically part of the ______.UreterNephronCalyxBladder单项选择题
A
Ureter
B
Nephron
C
Calyx
D
Bladder

Question

Question at position 28 The collecting ducts are continuous with the distal convoluted tubule but are not technically part of the ______.UreterNephronCalyxBladder

BlackTom AI · Accepted Answer

In this question, we’re testing knowledge of how the collecting ducts relate to other renal structures.
Option 1 (Ureter): The collecting ducts do not connect to the ureter directly; urine from collecting ducts drains into the renal papillae and then into the minor calyxes, pelvis, and ultimately the ureter. So this choice misplaces the anatomical relationship.
Option 2 (Nephron): The connective relationship between the collecting ducts and distal convoluted tubule is real, but the phrase says they are not technically part of the ______. The collecting ducts are not considered part of the nephron unit as a whole, since they are downstream collecting pathways after the distal tubule and are functionally distinct from the nephron segments (glomerulus, proximal tubule, loop of Henle, distal tubule). This makes Nephron the correct fill-in for the statement, as it separates the ducts from the classic nephron components in anatomical classification.
Option 3 (Calyx): The collecting ducts do drain into the calyces, but the statement asks about what they are not technically part of. While they feed into the calyces, they are not calyces themselves, and the relationship is more about drainage than an anatomical component membership. Thus this option is misleading if interpreted as “not part of the calyx.”
Option 4 (Bladder): The bladder is downstream in the urinary tract, receiving urine after it passes through the ureters and renal pelvis. The collecting ducts are far upstream of the bladder, so this choice describes a non-sequential relationship rather than a direct membership issue, making it clearly incorrect.
Overall, the options test both the drainage pathway of urine and the organizational boundaries between renal structures. The key idea is that the collecting ducts are continuous with the distal tubule but are not themselves considered part of the nephron unit as classically defined, hence the emphasis on the nephron as the boundary omitted in the statement.

Question at position 28 The collecting ducts are continuous with the distal convoluted tubule but are not technically part of the ______.UreterNephronCalyxBladder单项选择题

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