What is the soluble C3 convertase of the alternative pathway?

The secreted form of a T-cell receptor is:

Macrophage-like immune cells found in the liver are called _____ and in the brain they are called _____.

Which of the following is/are correctly matched?

________ is credited with inventing the first ever vaccine against a deadly disease, which was ________.

Which of the following is a complement control protein?

Where can complement proteins be found?

Clonal selection and expansion are part of the adaptive immune system.

B-cells express _______ on their surface.

T-cells complete their maturation in the thymus.