Cardiac Vascular Nursing Certification Practice Exam 2025 - Free Cardiac Vascular Nursing Practice Questions and Study Guide

The correct answer is the posterior pituitary, which plays a critical role in the storage and release of antidiuretic hormone (ADH), also known as vasopressin. ADH is synthesized in the hypothalamus and then transported down nerve axons to the posterior pituitary, where it is stored until needed. Upon stimulation, particularly in response to high plasma osmolality or low blood volume, ADH is released into the bloodstream.

Understanding this function is essential for recognizing how the body regulates water balance and blood pressure. The posterior pituitary's role in releasing ADH is crucial for promoting water reabsorption in the kidneys, impacts blood volume, and therefore can significantly influence cardiovascular physiology.

While the anterior pituitary, adrenal glands, and pancreas are involved in hormone production and regulation, they do not synthesize or release ADH. The anterior pituitary releases different hormones such as growth hormone and prolactin. The adrenal glands are primarily responsible for producing cortisol, adrenaline, and aldosterone, and the pancreas secretes insulin and glucagon to manage glucose levels.