1 The phenotype may change constantly throughout the life of an individual because of environmental changes and the physiological and morphological changes associated with aging.
What is parathyroid hormone? Parathyroid hormone is secreted from the four parathyroid glands, which are small glands in the neck, located behind the thyroid gland. Parathyroid hormone regulates calcium levels in the blood, largely by increasing the levels when they are too low.It does this through its actions on the kidneys, bones and intestine:hat is parathyroid hormone? Parathyroid hormone is secreted from the four parathyroid glands, which are small glands in the neck, located behind the thyroid gland. Parathyroid hormone regulates calcium levels in the blood, largely by increasing the levels when they are too low.
Sometimes called the master gland, the pituitary gland is the primary influencer of how your other glands operate. The pituitary gland secretes and stores hormones, which it uses to stimulate your other glands. Your hormones regulate a variety of body functions, such as temperature, urine production, thyroid activity, growth in children, and the production of sex hormones (testosterone in men and estrogen in women).