Final answer:
The statement is true; both antidiuretic hormone (ADH) and aldosterone are crucial in determining the amount of water reabsorbed in the kidney tubules.
Step-by-step explanation:
The statement that the amounts of antidiuretic hormone (ADH) and aldosterone secreted determine the amount of water reabsorbed in the tubules is true. ADH, which is also known as vasopressin, is produced by the hypothalamus and released from the posterior pituitary gland.
It regulates the amount of water reabsorbed by making the collecting ducts in the kidneys permeable to water. As a result, water molecules are reabsorbed from urine back into the capillaries through osmosis.
Meanwhile, aldosterone, produced by the adrenal cortex, enhances sodium reabsorption from the extracellular fluids and subsequent water reabsorption by diffusion in the kidney tubules. This hormone is stimulated by the renin-angiotensin system and increases when blood water concentration decreases or blood potassium levels are high.