-What is the problem, if a child has low concentration of calcitonin in blood? ?
2.-Where are produced the ADH and oxytocin?
3.- Please explain all the steps of the Renin-Angiotensin-Aldosterone axis.
4.- Why the heart and the thymus are considered organs with secondary endocrine functions? Please explain.
5.- Please explain Follicular phase and Luteal phase.