The vertebrate kidney helps to keep the acidity of the body fluids constant by varying the amount of hydrogen ions (H⁺)it secretes into the urine.You can confidently predict that this aspect of kidney function,like other mechanisms of homeostasis,will be controlled by ________.
A)a negative feedback mechanism
B)nerve impulses from the brain
C)a hormone produced in the brain
D)a hormone produced in the kidney itself

Question

Quizplus · Accepted Answer

Negative feedback mechanisms are commonly involved in maintaining homeostasis. In this case, if the acidity of the body fluids increases, the kidney would respond by secreting more hydrogen ions into the urine. This would then lower the acidity level in the body, which would then signal the kidney to decrease the secretion of hydrogen ions. This negative feedback loop helps to keep the acidity of the body fluids at a constant level.

The Vertebrate Kidney Helps to Keep the Acidity of the Body