Why do you suppose that the influenza virus protein that binds the virus to an infected cell is called hemagglutinin? hemagglutination is the clumping together of red blood cells?

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

i think its white blood cells

i hope this