How do you control the amount of water in your body?

Answer 1

The hypothalamus acts as the receptor for detecting whether water levels in the body are too high or too low by how concentrated or dilute the blood is.

If the water level in the body is too low, i.e. the blood is concentrated:

1. The pituitary gland secretes ADH (antidiuretic hormone)
2. ADH signals the renal tubules in the kidneys to reabsorb more water.
3. As a result the kidneys produce less urine, and that urine is more concentrated.
4. The extra water being reabsorbed helps to dilute the blood.

If the water level in the body is too high, i.e. the blood is dilute:

1. The pituitary gland is not stimulated to release ADH
2. Water reabsorption in the renal tubules is decreased.
3. More urine is produced and that urine is dilute.
4. Less water being reabsorbed helps to concentrate the blood a bit more.

All that YOU to help this process is urinate when your body tells you it needs to, and drink more water (fluids) when your body tells you you're thirsty.

Answer 2

To control the amount of water in your body, you can regulate your fluid intake by drinking enough water throughout the day. Additionally, managing your salt intake can help maintain the balance of water in your body. Your body also has regulatory mechanisms, such as the kidneys, that help adjust water levels by excreting excess water or retaining it as needed.