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.
Thyroid- stimulating hormone (TSH) stimulates the thyroid gland to produce hormones. Adrenocorticotrophic hormone (ACTH) stimulates production of hormones in the adrenal glands. the posterior or rear lobe of the pituitary gland secretes antidiuretic hormone (ADH), which regulates the balance of the water in the body.