A decrease in blood pressure/volume will not cause the release ofA. ADHB. ReninC. Atrial natriuretic factor D. Aldosterone

Aldosterone.

A decrease in blood pressure/volume typically triggers the renin-angiotensin-aldosterone system (RAAS) to regulate blood pressure and fluid balance. When blood pressure or volume drops, the kidneys release renin, which leads to the production of angiotensin II. Angiotensin II then stimulates the release of aldosterone from the adrenal glands, which helps retain sodium and water in the body, thus increasing blood pressure and volume.

So, in the given options:

A. ADH (antidiuretic hormone) is released when there's a decrease in blood volume or an increase in blood osmolality. It helps to conserve water by reducing urine output.

B. Renin is released in response to a decrease in blood pressure/volume to initiate the RAAS pathway.

C. Atrial natriuretic factor (ANF) is released when there's an increase in blood volume, and its main function is to promote the excretion of sodium and water, thereby reducing blood volume and pressure.

D. Aldosterone is released in response to the activation of the RAAS and an increase in angiotensin II levels, not as a result of decreased blood pressure/volume.

So, the correct answer is:

D. Aldosterone