The Immune System

Question 1

where are sites where immune responses can be mounted, and in which B-cells are activated?

Answer 1

Spleen and lymph nodes

Question 2

MHC class I is present where? and displays what?

Answer 2

In all nucleated cells and displays endogenous antigen to cytotoxic T-cells (CD8+ cells)

Question 3

MHC class II is present where? and displays what?

Answer 3

In professional antigen-presenting cells and displays exogenous antigen to helper T-cells (CD4+ cells)

Question 4

What cells do natural killer cells attack?

Answer 4

Cells not presenting MHC molecules, including virally infected cells and cancer cells

Question 5

Neutrophils

Answer 5

Ingest bacteria (opsonized); follow bacteria using chemotaxis

Question 6

Eosinophils

Answer 6

Used in allergic reactions and invasive parasitic infections; release histamine

Question 7

Basophils

Answer 7

Used in allergic reactions

Question 8

Active vs. Passive immunity

Answer 8

Immunization is active, transfer of antibodies is passive