Alternative names for calcitonin CT; thyrocalcitonin. What is calcitonin? Calcitonin is a hormone that is produced in humans by the parafollicular cells (commonly known as C-cells) of the thyroid gland. Calcitonin is involved in helping to regulate levels of calcium and phosphate in the blood, opposing the action of parathyroid hormone. This means that it acts to reduce calcium levels in the blood.
Definition of sanctification. 1  1 : an act of sanctifying. 2  2a : the state of being sanctifiedb : the state of growing in divine grace as a result of Christian commitment after baptism or conversion.
Iconology is the study of the meaning contained within the symbols in a particular work of art. For example, Caravaggio painted several martyred saints. But the figure crucified upside-down is a reference to St. Peter who, claiming himself unworthy to die in the same manner as Jesus, opted for the head-down position.