Aldosterone helps in the maintenance of

Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water and excretion of K+ and phosphate ions. Thus, aldosterone helps in the maintenance of electrolytes, body fluid volume, osmotic pressure and blood pressure.Sleep-wake cycle is regulated by melatonin.Calcium homeostasis is maintained by calcitonin and PTH.Basal metabolic rate is regulated by thyroid hormones.