Cells
What cells react to sunlight to produce vitamin D3?
Keratinocytes
What organ is both a target and source for calcitriol?
Kidney
What is the name of the hormone that is produced at the end of the vitamin D pathway?
Calcitriol
What bone cells break down bone, in order to help regulate blood calcium levels?
Osteoclasts
What organ responds to calcitriol to absorb more calcium from food?
Small Intestine
What does the body sense to help regulate bone density?
Blood calcium levels
What bone cells respond to calcitriol, which signals for them to take in more calcium?
Osteoblasts
What organ converts vitamin D3 into calcidiol?
Liver
What is the function of the kidney as the target of calcitriol?
Tells the kidneys to keep calcium in the blood, rather than expel it