Antidiuretic Hormone (ADH)is Produced by the Pituitary Gland When the Brain

Antidiuretic hormone (ADH) is produced by the pituitary gland when the brain detects lower than optimum levels of water in the body. In the kidneys, ADH promotes the uptake of water, creating more concentrated urine. ADH gets from the pituitary gland to the kidney through the

A) circulatory system.
B) nervous system.
C) endocrine system.
D) digestive system.