Since it is a light-absorbing pigment, chlorophyll is called a photoreceptor. Also note that there are two types of chlorophyll: chlorophyll a and chlorophyll b. Function. Chlorophyll molecules are contained inside chloroplasts, which are the food producers of the cell found
Calcitonin has an opposite effect, as it decreases the levels of calcium in the blood. Overall, PTH has a strong effect on the blood concentration of calcium, whereas calcitonin has a more moderate effect and is not critical in helping the body maintain normal blood calcium levels.
Two are located on the surface of the thyroid, the other two are either on the surface or buried inside. Parathyroid hormone (PTH) works with vitamin D to regulate the amounts of calcium that go into bone & teeth and float around in the blood. Normally about 90% of your body's calcium is in your skeleton.If your parathyroids become overactive, some of the calcium that should go into your bones stays in your blood instead.arathyroid hormone (PTH) and calcitonin regulate blood calcium levels. PTH increases the calcium concentration in the blood, and calcitonin decreases it.