Anatomy & Physiology Genitourinary #12


Which endocrine enzyme assists the renal system maintain fluid balance within the body?


  1. Aldosterone
    • Rationale:

      While aldosterone plays a role in fluid balance, this substance is hormone and not an enzyme.

  2. Angiotensin II
    • Rationale:

      Angiotensin is responsible for the release of the pituitary gland’s antidiuretic hormone (ADH). In addition, this enzyme triggers a desire for salt intake or thirst; therefore, it assists the renal system maintain fluid balance within the body.

  3. Antidiuretic hormone
    • Rationale:

      While the antidiuretic hormone plays a large role in the maintenance of fluid balance in the body, this substance is a hormone, not an enzyme.

  4. Adrenocorticotropic hormone
    • Rationale:

      Adrenocorticotropic hormone (ACTH) is made in the pituitary gland, a structure of the endocrine system. It is needed for the adrenal glands to work properly and helps the body react to stress; this hormone does not play a role in fluid balance.


The renal system has several different functions in the maintenance of homeostasis within the human body; one such function is the maintenance of fluid balance.


Learning Outcomes

The role of the renal system in terms of cardiac and fluid balance entails the physiological prompting of the kidneys by endocrine hormones and enzymes including:
Angiotensin II
Antidiuretic hormone
Each of these substances is secreted by the endocrine system to assist in the maintenance of fluid balance. Angiotensin II, however, is an endocrine enzyme that assists the renal system in maintaining fluid balance within the body.

Test Taking Tip

Read the question carefully to determine exactly what is being asked to answer correctly.

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