请输入您要查询的百科知识:

 

词条 Atrial volume receptors
释义

  1. See also

  2. References

{{refimprove|date=August 2017}}Atrial volume receptors (also known as Veno-atrial stretch receptors[1]) are low pressure baroreceptors that are found in the atria of the heart. They are myelinated vagal fibres in the endocardium found at the junction between atria and the vena cava/pulmonary vein.[1]

When these receptors detect a blood volume decrease in the atria, a signal is transmitted from the receptors to the hypothalamus in the brain. The hypothalamus, in turn, increases 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 increased production of vasopressin by the hypothalamus, will cause water retention in urine. This increases the blood volume, resulting in the increase of blood pressure.[2]{{Disputed inline|date=August 2017}}

There are two types, type A is activated by atrial wall tension in atrial contraction (during the a wave of the atrial pressure curve), type B is activated by atrial stretch during atrial filling (with the v pressure wave).[1]

They can display hysteresis.

See also

  • Atrial natriuretic peptide
  • Angiotensin
  • Bainbridge reflex
  • Aldosterone

References

1. ^{{Cite book|url=https://www.worldcat.org/oclc/191889940|title=Principles of physiology for the anaesthetist|last=Power|first=Ian|last2=Kam|first2=Peter|date=2008|publisher=Hodder Education|others=|isbn=9780340887998|edition=2nd|location=London|pages=168–169|chapter=4|oclc=191889940}}
2. ^{{cite book|url=https://books.google.com/books?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|title=Human physiology: From cells to systems|first=Lauralee|last=Sherwood|year=2008|publisher=Cengage Learning|page=567|isbn=978-0-495-39184-5|edition=7th revised}}
{{circulatory-stub}}

2 : Cardiac anatomy|Blood pressure

随便看

 

开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。

 

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间:2024/11/18 17:55:45