The primary route for water loss from the body is the system.

Correct Answer: B

Rationale: The urinary system is the primary route for water loss as it excretes water through urine, regulated by the kidneys to maintain fluid balance.

Correct Answer: A

Rationale: Vasopressin (ADH) increases water permeability in the collecting ducts, promoting reabsorption.

Correct Answer: C

Rationale: Vasopressin, secreted by the posterior pituitary, promotes water reabsorption in the kidneys.

Correct Answer: C

Rationale: Angiotensin-converting enzyme (ACE) converts angiotensin I to angiotensin II in the lungs.

Correct Answer: B

Rationale: Aldosterone promotes sodium reabsorption in the kidneys, increasing blood volume.