A 主要在近端小管重吸收 B
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251120/22551230_0_1.jpg"> C
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251120/22551230_0_2.jpg"> D
<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251120/22551230_0_3.jpg">