Final answer:
Atrial Natriuretic Factor is secreted in response to increased blood volume and B) hypertension (B), which leads to the stretching of the cardiac cells in the atria, resulting in the secretion of ANP that ultimately lowers blood pressure.
Step-by-step explanation:
Atrial Natriuretic Factor (ANF), also known as Atrial Natriuretic Peptide (ANP), is secreted by cells in the atria of the heart in response to increased blood volume. When the blood volume is high, it causes the cardiac cells to be stretched, leading to the secretion of ANP. ANP has several effects that lead to a reduction in blood volume and thereby lower blood pressure.
The answer to the student's question is B) hypertension. ANP is secreted in response to high blood pressure, which is often a result of increased blood volume, to induce diuresis and vasodilation, thus reducing blood pressure.