Practise AP Biology 4.1.B questions by distinguishing local regulators, synaptic chemical signals and hormones that travel to distant target cells.
Based on the information provided, which of the following best justifies the claim that osteocalcin is a hormone?
The phosphorylation of the insulin receptor causes a response in osteoblast bone cells.
The osteoblasts in the bone secrete osteocalcin, which causes cells in the pancreas to change their activity.
The change in expression of E s p changes the insulin receptor activity of the osteoblast.
The activation of the osteocalcin by a bone cell is pH dependent.
B