Q:The juxtaglomerular apparatus is responsible for -regulating the rate of filtrate formation and controlling systemic blood pressure.
-reabsorption of organic molecules, vitamins, and water.
-the secretion of drugs.
-the secretion of acids and ammonia.
-reabsoption of sodium and secretion of potassium/hydrogen ions.

regulating the rate of filtrate formation and controlling systemic blood pressure

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

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