Hypothalamo-Neurohypophyseal Tract
Posterior Pituitary, Vasopressin and Oxytocin
Hypothalamo-Neurohypophyseal Tract
The hypothalamo-neurohypophyseal tract contains axons linking hypothalamic neurosecretory cell bodies with posterior pituitary terminals. It carries vesicles containing hormone products and associated proteins.
Neural delivery and tissue response
Posterior pituitary function connects hypothalamic synthesis, axonal delivery and regulated release with receptor-specific effects. The kidney, vasculature, pituitary and reproductive tissues respond through different receptor systems. Local receptor expression and the prevailing physiological demand determine the relevant outcome.
Interpreting the mechanism
Damage can disrupt delivery or release without primarily injuring the kidney or mammary target tissue.
A fluid-balance example
During sustained exercise, osmotic and nonosmotic signals can alter antidiuresis. Fluid intake, sodium concentration, effective circulating volume and renal response must be considered together. A hormone measurement alone cannot describe the full water-balance disturbance.
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