Which of the following would help maintain the medullary concentration gradient?
A. Urea movement from the collecting duct to medullary interstitial fluid
B. Urea movement into the collecting duct
C. Movement of water from the ascending limb into the medullary interstitial fluid
D. Active transport of Na+ and Cl? from the medullary interstitial fluid into the collecting duct
E. Movement of urea from the distal convoluted tubule to the proximal convoluted tubule
Answer: A
You might also like to view...
The surgical instruments were put in the ______________ to sterilize them for the next procedure
Fill in the blank(s) with correct word
Which of the following neuroglia are not part of the CNS?
A) Satellite cells B) Microglia C) Ependymal cells D) Astrocytes
Interstitial cells produce
A) sperm. B) FSH. C) nutrients. D) testosterone. E) androgen-inhibiting protein.
The primary function of the proximal convoluted tubule is
A) filtration. B) reabsorbing nutrients. C) secretion of acids and ammonia. D) secretion of drugs. E) adjusting the urine volume.