Renal failure is the severe impairment or total lack of _______ function. A. liver B. heart C. kidney D. bladder

The use of Viagra and _______ concurrently can cause hypotension.

A. nitroglycerine
B. ceftriaxone
C. Danocrine
D. Videx

The urinary system helps to maintain the proper pH (acid-base) balance of the

A. muscles.
B. blood.
C. intestines.
D. brain.

The female is born with about _______ immature sex cells.

A. 3-4 million
B. 1–2 million
C. 5,000
D. 10,000