Question

Which of the following accurately describes kidney function?

A. Kidneys will excrete salts if you have too little in your blood.
B. Kidneys are directed by the presence of antidiuretic hormone to excrete more water in urine.
C. Kidney function is controlled by the blood's composition and hormones.
D. Kidneys can excrete salts, but not glucose.

Answer 1

The answer to the question stated above is letter B. Kidneys are directed by the presence of antidiuretic hormone to excrete more water in urine.

Antidiuretic hormone is also known as ADH. It is a small molecule that is released by the pituitary gland at the base of the brain after being made nearby in the hypothalamus. ADH has what we called an "antidiuretic action" which prevents the production of dilute urine.