Briefly explain what the kidney does to compensate for decrease in CO

Sympathetic stimulation leads to vasoconstriction of the renal artery which leads to sodium and water retention This leads to increase in release of renin hence leading to production of angiotensin I and angiotensin II ( Angiotensin converting enzyme ) Angiotensin II causes more vasoconstriction and increases the TPR which increases blood pressure Angiotensin II also leads to release of Aldosterone which increases sodium and water retention This leads to increase in volume so it increases central venous pressure This hence leads to increase in end diastolic pressure And according to Starling's Law it leads to increase in CO Angiotensin II also leads to further sympathetic stimulation