The behaviour of the renin-angiotensin-aldosterone system in adult albino rats was studied during audiogenic stress (92 dB - 2000 Hz) for different experimental times (4-8-12-16-20-24-28 min). The results show the two-phase behaviour of PRA (plasma renin activity), which is related to aldosterone levels. These changes do not appear to depend on plasma electrolytes (sodium and potassium), while a possible role of ACTH is suggested.
Acoustic Stimulation Aldosterone