Conquer the NBEO General Physiology Exam 2026 – Unleash Your Inner Eye Expert!

The hormones secreted by the posterior pituitary gland are antidiuretic hormone (ADH), also known as vasopressin, and oxytocin. The posterior pituitary is responsible for the storage and release of these hormones, which are synthesized in the hypothalamus and transported down nerve axons to the posterior pituitary where they are released into the bloodstream.

ADH plays a crucial role in regulating water balance within the body. It acts primarily on the kidneys to promote water reabsorption, thereby concentrating urine and reducing water loss. This regulation is vital for maintaining blood pressure and overall fluid homeostasis.

Oxytocin, on the other hand, is primarily involved in reproductive functions. It stimulates uterine contractions during childbirth and promotes milk ejection during breastfeeding. Both hormones are essential for various physiological processes that support hydration and reproductive health.

The other hormone pairs listed are produced by different glands. For example, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are secreted by the anterior pituitary and play key roles in regulating the menstrual cycle and spermatogenesis. Prolactin and thyroid-stimulating hormone (TSH), also secreted by the anterior pituitary, are involved in