Atrial volume receptors

Atrial volume receptors are low pressure baroreceptors that are found in the atria of the heart and pulmonary arteries.

When these receptors detect a blood volume increase in the atria, which indicates an increase in the arterial pressure, a signal is transmitted from the receptors to the hypothalamus in the brain. The hypothalamus, in turn, decreases the production of vasopressin (ADH, AVP, or arginine vasopressin). These receptors also cause a renal vasodilation, resulting in increase of the water amount in the glomerular filtrate which, combined with the decreased production of vasopressin by the hypothalamus, will cause a massive water loss through urine (increase in the urinary debit). That water loss decreases the blood volume, resulting in the decrease of its pressure.[1]

See also

References

  1. ↑ Sherwood, Lauralee (2008). id=gOmpysGBC90C&lpg=PT595&ots=POQadZO5Ye&dq=%2B%22atrial%20volume%20receptors%22%20%2Bvasopressin&pg=PT595#v=onepage&q=+%22atrial%20volume%20receptors%22%20+vasopressin&f=false Human physiology: From cells to systems Check |url= value (help) (7th revised ed.). Cengage Learning. p. 567. ISBN 978-0-495-39184-5.


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