<span>Parathyroid Hormone (PTH) is a hormone that signals an increase in blood calcium (Ca2+) within into the bloodstream when below normal ranges. When blood calcium is within normal ranges Calcitonin is released from the thyroid to stop blood calcium from increasing thus maintaining equilibrium.</span>
The ATP<span> is used for many cell </span>functions including transport work moving substances across cell membranes whereas Fat<span> is a backup source of energy to fuel our workout when carbohydrates are not available.</span>.