What hormones cause calcitonin and parathyroid hormone to be released? I know blood ca level has to do with it, but what hormones cause their release?

No hormones. Parathyroid hormone is released as a response to your calcium level (low calcium causes increased PTH). It is not regulated by any particular hormones. Calcitonin is a hormone that has no obvious function in humans (as opposed to fish). It is made in the thyroid gland, but people who have had their thyroid removed do not need calcitonin to remain normal.

Related Questions

Are there any books or types of books I can read about how calcitriol, calcitonin, and parathyroid hormone work together?

Wikipedia. You seem to have a lot of questions on this topic. I have found that Wikipedia is a good source for information. You could search under "calcium homeostasis", as well as Vitamin D, parathyroid hormone and calcitonin to gain a better understanding on how these hormones work together to control your calcium level. Read more...