Which of the following is the most significant difference in the reabsorption properties of the PCT compared to the DCT?
- AThe PCT reabsorbs water selectively, while the DCT reabsorbs water obligatorily.
- BThe PCT is the primary site for conditional reabsorption of Na⁺, while the DCT is for unconditional reabsorption.
- CThe PCT reabsorbs nearly all essential nutrients, whereas the DCT's reabsorption is largely conditional and regulated by hormones.
- DThe PCT is impermeable to urea, while the DCT is highly permeable to urea.
✓ Correct answer: C
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