What Condition Stimulates Kidney Cells to Secrete More Erythropoietin

Question

What condition stimulates kidney cells to secrete more erythropoietin?  
A) Decompression
B) Narcosis
C) Hypoxia
D) Acclimatization
E) Hemoglobin

Accepted Answer

Hypoxia, or low oxygen levels, stimulates the kidney cells to secrete more erythropoietin. This hormone then stimulates the bone marrow to produce more red blood cells, which can carry more oxygen to the body's tissues.