Some places you can check a pulse on a newborn. 1  Apical: Gently place two fingers over the center of the sternum (breast bone) and then move them about 1 inch to the left of the breast bone, at or above the nipple line. Without compressing, you should be able to feel the baby's heart beat beneath.
The body maintains the right level of potassium by matching the amount of potassium consumed with the amount lost. Potassium is consumed in food and drinks that contain electrolytes (including potassium) and lost primarily in urine. Some potassium is also lost through the digestive tract and in sweat.
How the Body Uses Potassium. As an electrolyte, potassium enables cells to carry electrical impulses within the cells themselves and outside the cells to other parts of the body as well. In this way, nerve impulses and muscle contractions can travel to the part of the body where and when theyâre needed.