Question 1
The action of platelet-derived growth factor is to stimulate the production of which cells?
◦ Platelets
◦ Epidermal cells
◦ Connective tissue cells
◦ Fibroblast cells
Question 2
What role do cytokines play in cell reproduction?
◦ Provide growth factor for tissue growth and development
◦ Block progress of cell reproduction through the cell cycle
◦ Restrain cell growth and development
◦ Provide nutrients for cell growth and development