The renal tubules secrete h + into the tubular fluid, where most of it binds to bicarbonate, ammonia, and phosphate buffers.

a. True

b. False

The answer is True. Excretion of H + ions from the body through urine is part of the body’s feedback mechanisms to maintain homeostatic pH of the body. This is achieved in the renal tubules of the kidneys. H + and HCO3 - ions are the main ions responsible for maintaining pH balance in the body.