Immunity and healing Flashcards
Lymphocyte
white blood cells considered primary immune cells.
2 types
B cells are produced in red bone marrow
T cells produced in red bone marrow and migrate to thymus for maturation
MALTs
Mucosa associated lymphoid tissue found in respiratory, digestive, and reproductive tracts (peyers patches in small intestive is example)
Spleen
Stores lymphocytes and filters blood, stores platelets, blood reservoir,
Nonspecific Immune defenses
aka innate defenses or physical and chemical barriers designed to keep foreign substances out of body
Internal antimicrobial proteins
Interferons - induce production of proteins that shut down virus ability to replicate
Complement proteins - enhance the immune system by supporting nonspecific immune responses
Transferrins - Proteins that bind to iron to interfere with bacteria
Antimicrobial peptides -short chain amino acids disrupt the plasma membrane of pathogens
Phagocytes/tosis
cells thatdestroy microbes by ingesting them via phagocytosis
Monocytes turn into macrophages or big eaters - key role in immune response
chemotaxis
chemcials released by cells at site of infection to attract phagocytes
Natural killer cells
attach themselves to surface of infected cells and destroys plasma membrane via cytolysis.
Specific immune response
acquired over time through exposure to specific pathogens
Antigen
protein on a cell membrane with specific chemical marker
antibody mediated immunity
when b cells recognize an antigen and causes cells to divide and multiply into two types of daughter cells memory and plasma cells. plasma produces immunoglobin that travel to infection sites. Memory cells remember initial exposure and stand by to respond to additional exposure
Cell mediated immune response
cells divide and multiply into
cytoxic cells
memory
helper
Suppressor
Naturally acquire immunity
active or passive exposure to pathogen like chicken pox