Anatomy & Physiology Genitourinary #10

Question

Which is the primary function of the antidiuretic hormone (ADH) in the body’s fluid balance?

Answers

  1. It increases blood pressure.
    • Rationale:

      While ADH prevents urine production which can, indirectly, increase blood pressure, this is not the primary function of this hormone.

  2. It moves fluids and molecules.
    • Rationale:

      ADH does not play a role in the movement of fluids and molecules within the body.

  3. It prevents urine production.
    • Rationale:

      ADH prevents diuresis or urine production. This is the primary function of this hormone in the maintenance of fluid balance within the body.

  4. It mediates extracellular volume.
    • Rationale:

      While ADH prevents the production of urine which can indirectly impact extracellular volume, this is not the primary function of this hormone.

Overview

Kidney function, which requires assistance by endocrine hormones (e.g., ADH), impacts both cardiac function and fluid balance within the body.

Explanation

Learning Outcomes

ADH is a hormone produced by the hypothalamus and stored in the posterior pituitary gland. It tells the kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in the blood thereby preventing urine production, if needed.

Test Taking Tip

Think about what the term antidiuretic means when determining the correct answer choice for this question.

Video Rationale