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?

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 _________________.

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