Respuesta :
The order in which the ADH stimulated by plasma osmolarity occurs is:
an increase in plasma osmolarity, activation of osmoreceptor, release of ADH, reabsorption of water.
The antidiuretic hormone (ADH) is responsible for the homeostatic valance and increase in blood's volume. The activation of this hormone and how it works is as follows:
- There is a low concentration of water in the body, which decreases the extracellular fluid.
- The decrease in the extracellular fluid results in a reduction of the plasma osmolarity, in other words, the blood volume is reduced.
- As a consequence, the osmoreceptors in the hypothalamus, kidneys, and carotid detect the high concentration of solutes.
- The hypothalamus releases ADH.
- The hormone travels through the blood to the kidney. There, it stimulates the reabsorption of water and reduces urine production.
- The body is hydrated again.
To sum up, the body detects a high concentration of solutes due to a loss of water. Then it releases ADH; as a consequence, the kidneys reabsorb water till the osmolarity decreases.
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