_________________________ is an example of an opsonin.

All immune cells originate from this type of stem cell.

The alternative pathway of complement activation begins when ________.

Natural killer cells originate from these progenitors.

These immune cells produce platelets needed for clotting and inflammation.

____________________ make up the C5 convertase of the alternative pathway of complement activation.

____________________ make up the C3 convertase of the classical pathway of complement activation.

This part of the thymus is where the majority of thymocytes are found.

If a stem cell no longer make the transcription factor Notch, the stem cells cannot develop into ____________________.

Which of the following complement proteins would be involved in neutralizing viruses using antibodies?