While PTH acts to increase the concentration of ionic calcium (Ca 2+) in the blood, calcitonin, a hormone produced by the parafollicular cells (C cells) of the thyroid gland, acts to decrease ionic calcium concentration.hile PTH acts to increase the concentration of ionic calcium (Ca 2+) in the blood, calcitonin, a hormone produced by the parafollicular cells (C cells) of the thyroid gland, acts to decrease ionic calcium concentration.
Best Answer: Florida's average width is about 160 miles down Through the peninsula; but is nearly 400 miles east to west across the panhandle. Florida is an average of 162 miles (260 km) wide in the peninsula.
Geography of the Florida Keys. The Florida Keys are an archipelago of about 1700 islands in the farthest southeast portion of the United States. They extend from the southeastern Florida peninsula about 15 miles south of Miami, and run south-southwest gradually curving west to Key West and out to the uninhabited Dry Tortugas.