Norepinephrine performs its actions on the target cell by binding to and activating adrenergic receptors. The target cell expression of different types of receptors determines the ultimate cellular effect, and thus norepinephrine has
While specific vitamins and minerals do not cause muscle cramps, a deficiency in potassium or magnesium can lead to sports-related leg cramping, according to Everyday Health. Additionally, a deficiency in vitamins E, A, and B causes cramping due to reduced circulation, as explained WeightTraining.com. Keep Learning.
Heart rhythm disorder Some heart rhythm disorders can cause a fluttering in the chest, shortness of breath, chest pain or dizziness. Low potassium (hypokalemia) If the level of potassium in your blood drops below normal, it may cause low energy, leg cramps, and more.