19. Innate Immunity

In humans, stem cells from which all blood cell types are developed are found in the:

The hematopoietic stem cell has the ability to develop into which of the following cell types?

1. Macrophage.    2. Red Blood Cell.        3. Neutrophil.               4. B Cell.              5. Dendritic cell.

Label the following as either primary or secondary lymphoid tissues:Spleen, lymph node, adenoids, thymus, tonsils, bone marrow

____________ are innate molecular defenses that collectively limit free iron in the blood. Examples of these factors in humans include ____________, ____________, ____________, and ____________.

Which of the following are formed elements of the blood? Select all that apply.

a. Platelet

b. Leukocyte

c. Plasma

d. Erythrocyte

e. Complement proteins

Name the cells.

a. ___________ <IMAGE> b. ___________ <IMAGE> c. ___________ <IMAGE> d. ___________ <IMAGE> e. ___________ <IMAGE>

How can a human make 100 billion different antibodies with only 25,000 different genes?