Which of the following is NOT a known cause of aldosterone release?

Aldosterone is a hormone produced by the adrenal glands and is primarily involved in regulating sodium and potassium levels in the body, as well as blood pressure. Its release is stimulated by various factors, notably low blood volume or pressure.

Hypervolemia, or an excess volume of blood in the body, does not prompt the release of aldosterone. In fact, when blood volume is high, the body usually aims to reduce blood pressure, which can lead to a decrease in aldosterone secretion as the body does not need to conserve sodium and water. This mechanism prevents further increases in blood volume.

In contrast, conditions such as congestive heart failure can lead to decreased effective blood volume due to poor circulation, thereby stimulating aldosterone release as a compensatory mechanism to retain sodium and water. Angiotensin II is a powerful stimulator of aldosterone release, particularly in response to low blood pressure or reduced sodium levels, and hypokalemia, which is low potassium in the blood, also stimulates aldosterone secretion to help promote potassium excretion. Thus, identifying hypervolemia as the only option that does not trigger aldosterone release aligns with the hormone's function in fluid balance and blood pressure regulation.