Parathyroid hormone is synthesized in Bbl6epuTe oạMH OTBeT: a. adrenal glands b. pituitary gland c. thyroid gland d. parathyroid glands

## Step 1<br />Parathyroid hormone (PTH) is a hormone that plays a crucial role in regulating the body's calcium and phosphorus levels. It is synthesized by the parathyroid glands, which are small glands located in the neck.<br />## Step 2<br />The parathyroid glands are responsible for monitoring the calcium levels in the blood. If the calcium levels drop below a certain point, the parathyroid glands will produce and release PTH.<br />## Step 3<br />The PTH then acts to increase the calcium levels in the blood. This is done by stimulating the release of calcium from the bones, increasing the absorption of calcium in the intestines, and reducing the loss of calcium in the urine.<br />## Step 4<br />Given the options, the parathyroid glands are the correct answer because they are the site of PTH synthesis.