Final answer:
The endocrine system conserves water in the body during exercise by regulating the release of ADH.
Step-by-step explanation:
The correct answer is:
The pituitary gland produces antidiuretic hormone (ADH), which stimulates the kidneys to reduce the loss of water in urine. ADH acts on the kidneys by increasing their ability to reabsorb water, resulting in less water being lost through urine and more water being conserved in the body.
Thus, the endocrine system helps to conserve water in the body during exercise by regulating the release of ADH.
Learn more about Endocrine system's role in water conservation