Epinephrine and peptide hormones are not lipid-soluble, which means they:
A) cannot diffuse through a cell membrane.
B) bind to receptor proteins on the outer surface of the cell.
C) Both A and B.
D) None of the above
Question 2
________ are small proteins released by activated tissue cells infected with viruses.
A) Interons B) Masts C) Interferons D) Complements