Question

Tomato juice has the same (or slightly higher) salt concentration as blood plasma. The salt and water were absorbed into the blood of this student so that:

A. the level of ADH in his blood increased so that more water passed from the nephron into the blood.
B. the level of ADH in his blood decreased so that less water passed from the nephron into the blood.
C. the level of ADH in his blood increased so that less water passed from the nephron into the blood.
D. the level of ADH in his blood decreased so that more water passed from the nephron into the blood.

Answer 1

The level of ADH in the student's blood increased so that less water passed from the nephron into the blood.

Step-by-step explanation:

The correct answer is C. the level of ADH in his blood increased so that less water passed from the nephron into the blood.

ADH, also known as antidiuretic hormone, is responsible for regulating water reabsorption in the kidneys. When the blood osmolarity increases, such as when the salt concentration is high, ADH levels increase to reduce water loss in urine.

In this case, since the salt concentration in the student's blood has increased due to the absorption of salt from the tomato juice, the level of ADH in the blood would increase to reduce the amount of water passing from the nephron into the blood.