Renal overview

Question 1

Which area of the nephron is the diluting segment?

Answer 1

Thick ascending limb

Question 2

Which part of the nephron is responsible for isosmotic reabsoprtion?

Answer 2

Proximal tubule

Question 3

Where does ADH act in the kidney?

Answer 3

Entire collecting duct

Question 4

Where is most of the sodium reabsorbed? What transporter?

Answer 4

1. Proximal tubule 2. Na-H antiporter

Question 5

What is the role of the macula densa?

Answer 5

Measures flow of fluid and rate that NaCl is being delivered to distal tubule - controls vasodilation and vasoconstriction of afferent arteriole

Question 6

What is reabsorbed in the first part of the thick ascending loop?

Answer 6

Na, K, Cl

Question 7

First portion of thick ascending limb is impermeable to what compounds?

Answer 7

Water, urea

Question 8

Where are urea uniporters located?

Answer 8

Medullary portion of collecting ducts

Question 9

The principal cells in the cortical portion of the collecting duct are responsive to which compound?

Answer 9

Aldosterone