MICR 270 EXAMS BUNDLE with Questions and 100% Verified Answers

MALT (Mucosal Associated Lymphoid Tissues) - Answer Structure: Combined surface area of various areas in the body Location: mucous membranes lining the digestive, respiratory and urogenital systems Function: Initiates immune response to specific antigens encountered along mucosal surfaces Splee...

hematopoietic cells - Answer self-renewing, pluripotent myeloid progenitor - Answer differentiate into most of the cells of the innate immune system monocyte/macrophages - Answer phagocytes, can travel outside the circuitry system by crossing the blood vessel wal

What are the goals of the immune system? - Answer Discriminate: Recognize self from non-self Eliminate: Destroy non-self (pathogen) and altered self cells (cancer) - Occurs through the ability of immune cells to initiate immune response - Antigen enters → recognized → effector cells are acti...

Once a pathogen is eliminated, the vast majority of lymphocytes undergo _______________ the immune response gradually increases/declines - Answer apoptosis declines What happens to the cells that survive the contraction phase? - Answer They become memory cells

Major Histocompatibility Complex (MHC) - Answer Group of genes that code for proteins found on the surfaces of cells that help the immune system recognize foreign substances. memory cells - Answer General term for lymphocytes that are responsible for immunological memory and protective immunity....

Natural killer/NK cells function/characteristics - Answer - Granular lymphocytes - Have granules containing perforin and granzymes - Can recognize abnormal cells (tumour or virus-infected cells) and destroy them (Lack antigen-specific receptors) - Exception to lymphoid lineage (This is because t...