What hormone acts on sodium re-absorption in “F”? 

Juxtamedullary nephrons are important for production of concentrated urine when you are dehydrated.

Which cells/structures  produce testosterone?

Name structure “c” from the figure:

Corpus luteum is maintained by this embryonic structure in the case of pregnancy:

What is the major extracellular cation?

Glucose is reabsorbed completely in this part of the nephron:

Kidneys are located intraperitoneally.

What structures are indicated with the letter “I”?

The function of structures “E” and “H” is to create the medullary gradient of salt.