________ is due to congenital hypothyroidism.

From which structure does the descending limb of the loop of Henle originate?

A. peritubular capillary B. collecting duct C. proximal convoluted tubule D. renal pyramid

In almost all cases, CHAMPVA is the

A. tertiary payer. B. only payer. C. secondary payer. D. primary payer.