Rock is considered an ecosystem because based on the definition of ecosystem. A rock is happens to be in our environment which makes it part of our ecosystem. 1 person found this useful.
Parathyroid hormone. Parathyroid hormone (PTH), also called parathormone or parathyrin, is a hormone secreted by the parathyroid glands that is important in bone remodeling, which is an ongoing process in which bone tissue is alternately resorbed and rebuilt over time. It essentially increases blood calcium levels.
3 years ago. Parathyroid hormone and calcitonin are antagonistic hormones, which are released in response to blood calcium levels. In other words, PTH acts on the same target organs as calcitonin, but produces the opposite effects.Parathyroid hormone is released from the parathyroid glands, and calcitonin is released from the thyroid gland. If blood calcium concentration is high, calcitonin is released.arathyroid hormone is released from the parathyroid glands, and calcitonin is released from the thyroid gland. If blood calcium concentration is high, calcitonin is released.