Low pressure receptors
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Low pressure baroreceptors are
systemic veins and in the walls of the atria of the heart, and pulmonary vasculature. Low pressure baroreceptors are also referred to as volume receptors and cardiopulmonary baroreceptors.[1]
Structure
There are two types of cardiopulmonary baroreceptors. Type A receptors and Type B receptors are both within the
left atrium, the junction is at the pulmonary veins.[2]
Function
Low pressure baroreceptors are involved in regulation of the blood volume. The blood volume determines the mean pressure throughout the system, especially venous side where most of the blood is held. Low pressure baroreceptors have both circulatory and renal effects, which produce changes in hormone secretion. These secretions can effect the retention of salt and water as well as influencing the intake of salt and water within the kidneys. The renal will allow the receptors to change the longer-term mean pressure.[3]
Through the
sinus node in the atria, which causes increased heart rate/cardiac output. These cardiopulmonary receptors also inhibits vagal stimulation in the vasoconstrictor center of the medulla resulting in decreased release of angiotensin, aldosterone, and vasopressin.[1]
See also
References
- ^ a b Armstrong, Maggie, et al. Physiology, Baroreceptors - Statpearls - NCBI Bookshelf. 9 Mar. 2022, https://www.ncbi.nlm.nih.gov/books/NBK538172/ .
- PMID 4582061.
- PMID 26159318.
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