Answered: How is secretion of antidiuretic…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

How is secretion of antidiuretic hormone controlled?

Expert Solution

Step 1

Antidiuretic hormone is also known as Arginine vasopressin. The antidiuretic hormone works by regulating water levels and thus the urine concentration excreted by the kidney to maintain blood pressure, blood volume, and the tissue water content.

Step 2

There are a set of factors that regulate the release of antidiuretic hormone from the pituitary into the bloodstream.
Sensors (receptors) of the heart and large blood vessels are identified by decreased blood volume or low blood pressure during dehydration or hemorrhage.
This stimulates the release of antidiuretic hormones.
Antidiuretic hormone secretion is often observed when the salt concentration rises in the bloodstream, for example, due to insufficient water drinking on a hot day.
Special nerve cells in the hypothalamus are identified to stimulate the release of Antidiuretic hormones from the hypophysis.
The hormone is filled with a carrier protein called neurophysin in secretary vesicles and is released after hormone secretion in the hypothalamic neuron.