Question

1. what is the function of na+, cl- and k + co - transport on the luminal membrane of the loop of henle?

a. absorb na+, secrete cl-, k+
b. absorb na+, cl-, k+
c. absorb na+, cl-, secrete k+
d. absorb cl-, k+, secrete na+

1. which segment of renal tubular reabsorb glucose?

a. proximal tubule
b. the ascending limb of loop of henle
c. collecting duct
d. distal tubular

Explanation:

Question 6

On the luminal membrane of the loop of Henle, the \( \text{Na}^+ \)-\( \text{K}^+ \)-\( 2\text{Cl}^- \) co - transport system functions to absorb \( \text{Na}^+ \), \( \text{Cl}^- \), and \( \text{K}^+ \) from the tubular fluid into the cells of the thick ascending limb. Option A says secrete \( \text{Cl}^- \) and \( \text{K}^+ \) which is wrong. Option C says secrete \( \text{K}^+ \) which is wrong. Option D has incorrect ion movement directions.

The proximal tubule is the main site for the reabsorption of glucose in the renal tubule. The ascending limb of the loop of Henle, collecting duct, and distal tubule do not reabsorb glucose (under normal physiological conditions, all glucose is reabsorbed in the proximal tubule).

Answer:

B. Absorb \( \text{Na}^+ \), \( \text{Cl}^- \), \( \text{K}^+ \)

Question 7