Final answer:
The water-conserving hormones among the options provided are aldosterone and vasopressin, making the correct answer I and II only. Aldosterone promotes water retention by reabsorbing sodium and water in the kidneys, whereas vasopressin increases water reabsorption into the blood from the kidneys.
Step-by-step explanation:
The indicating aldosterone and vasopressin as the correct hormones involved in water conservation. Aldosterone works by causing the reabsorption of sodium ions and water in the kidney, which leads to water retention. On the other hand, vasopressin, also known as antidiuretic hormone (ADH), helps to maintain homeostasis in body water by making the collecting ducts in the kidneys permeable to water, which increases water reabsorption into the blood.
Oxytocin, while an important hormone, is not involved in water conservation. Its primary roles are to stimulate uterine contractions during childbirth and the letdown of milk in breastfeeding, not to directly influence water balance in the body.
Aldosterone and vasopressin are the two water-conserving hormones out of the three options provided. Aldosterone acts on the kidneys, promoting the reabsorption of sodium and water, thereby conserving water. Vasopressin, also known as antidiuretic hormone (ADH), acts on the kidneys by inserting aquaporins in the collecting ducts, allowing for the reabsorption of water. Oxytocin, on the other hand, regulates uterine contractions and the letdown of milk in nursing mothers, but it does not play a role in water conservation.