Which of the following statements regarding transforming growth factor b (TGF-b) are true?
A.	TGF-b expression is autoregulated
B.	TGF-b enhances collagen synthesis
C.	TGF-b inhibits extracellular matrix production
D.	TGF-b may inhibit or promote cellular proliferation
Answer:A
Which of the following statements regarding transforming growth factor b (TGF-b) are true?
A.	TGF-b expression is autoregulated B.	TGF-b enhances collagen synthesis C.	TGF-b inhibits extracellular matrix production D.	TGF-b may inhibit or promote cellular proliferation