It is the parathyroid gland.
A. Decreases blood Ca+2 level
B. Increases blood Ca+2 level
C. Promotes collagen synthesis by osteoblasts
D. All of the above
Answer:A
It is the parathyroid gland.
A. Decreases blood Ca+2 level B. Increases blood Ca+2 level C. Promotes collagen synthesis by osteoblasts D. All of the above