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The common progenitor of red and white blood cells:

Opportunistic pathogens can take advantage of a weakened immune system to establish infection.

The common progenitor of all red and white blood cells, is called:

The myeloid precursor gives rise to which cells?

Monocytes __________.

CR1 is a complement fragment found on macrophages that binds to the C3b receptor bound to the pathogen surface.

Which lymphocyte has orangish red staining granules and are involved in allergic responses?

Factor H, a plasma protein, decreases the amount of complement activation by binding to C3b, making it susceptible to cleavage by factor I and forming ________.

Which of the following complement control proteins can bind to C3b on human cell-surface and prohibit the C3 convertase of the alternative complement pathway from forming?

The hematopoietic stem cell: