When these receptors detect a blood volume increase in the atria, the atrial stretch triggers the release of Atrial Natriuretic Peptide (ANP), and a signal is transmitted from the receptors to the hypothalamus in the brain.
If the receptors notice an increase in blood volume within the atria, they will release Atrial Natriuretic Peptide (ANP) due to the stretch of the atria. As a result, a signal is sent from these receptors to the hypothalamus in the brain.