Final answer:
Magnesium influences calcium levels through calcium antagonism, promoting vascular relaxation and controlling blood pressure. Magnesium deficiency can increase blood pressure and heart rate, and stimulate the synthesis of aldosterone.
Step-by-step explanation:
Magnesium plays an important role in influencing calcium levels through calcium antagonism. Magnesium promotes vascular relaxation, which helps to control blood pressure, while magnesium deficiency can result in increased blood pressure and heart rate. Additionally, magnesium deficiency may stimulate the synthesis and secretion of aldosterone, which further affects systemic vascular resistance and blood pressure.