Mechanisms for controlling water movement between the fluid compartments of the body constitute the slowest-acting fluid balance devices.

Question

Quizplus · Accepted Answer

Osmoregulation and renal regulation of blood volume and pressure, which involve mechanisms for controlling water movement between fluid compartments, are not the slowest-acting fluid balance devices. Hormonal regulation, such as the action of antidiuretic hormone (ADH), can initiate changes relatively quickly, within minutes to hours. The slowest mechanisms involve changes in protein and lipid concentrations, which can take days.

Mechanisms for Controlling Water Movement Between the Fluid Compartments of the Body