The alternative pathway of complement activation begins when ________.

All immune cells originate from this type of stem cell.

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

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

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

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

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

These immune cells produce platelets needed for clotting and inflammation.

Chlamydia are intracellular nonmotile bacteria that can cause infertility. Predict the best type of defense to clear Chlamydia. 

Protein B is found on the surface of the protozoa Amoeba and activates the adaptive response. Protein B is considered an example of a/n _________________.