________ The kidneys of the fetus begin forming urine at the 15th week of gestation

You lose heat through respiration by:

A) evaporation. B) radiation. C) convection. D) all of the above.

After age 20, how much does the FEV1 decrease for males?

A. 50 mL/year B. 40 mL/year C. 30 mL/year D. 20 mL/year