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Wednesday, August 7, 2013
The main role of Vasopressin
Vasopressin, also known as antidiuretic hormone (antidiuretic
hormone, ADH). The posterior pituitary organizations purification of
a hormone. Depending on the hypothalamic neuroendocrine cells of
nuclear synthesis. After synthesis, nerve fiber sheath attached to a
carrier protein, along supraoptic - pituitary axis of the beam and to
the slurry flows downward capillary basement membrane near the
posterior pituitary, stored in the posterior lobe, and often a small
amount released into the bloodstream. Depending on when the nucleus
is stimulated, the impulse along the beam reaches the hypothalamus
pituitary neurohypophysis → large number of vasopressin release. The
main chemical structure of eight amino acid peptide. Two of cysteine
as a cystine calculation. Most mammals and arginine vasopressin. Cat
lysine vasopressin vasopressin.
The main role of vasopressin antidiuretic, not to mention high blood
pressure. Hundreds of micro-units can significantly increase the
renal distal convoluted tubule especially collecting duct water
permeability. By increasing the distal convoluted tubule and
collecting duct water permeability tubules and collecting ducts to
promote reabsorption of water, decreased urine output. The effect of
vasopressin increased hypertension need large doses of vascular
smooth muscle contraction can cause a slight increase peripheral
resistance and blood flow.
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