Week 1 Flashcards
Edward Jenner used what to vaccinate against smallpox in 1796?
cowpox
which virus did dmitri ivanosky discover?
tobacco mosaic virus
what did both Iilya Iiyich Mechnikov and Paul Ehrlich receive in 1908?
Noble prize
where do dendritic cells originate from?
lymphoid progenitor
T/F the mucous membrane covers more surface area than the skin
True
what do cilia do in the lungs?
remove microbes and debris
what are the three main types of phagocytes?
macrophages, neutrophils, and dendritic cells
what does a macrophage use to draw in foreign objects to “eat” them?
pseudopod
explain how chemotaxis occurs in a neutrophil
when a neutrophil SENSES something to engulf it becomes POLARIZED which causes CHEMOTAXIS where the neutrophil is attracted to the thing it wants to engulf and can track it down to ingest it
what are the two adaptive immunity cells called?
T lymphocytes and B lymphocytes
what mainly comprises our innate immunity?
- epithelial barriers
- phagocytes
- complement system
- NK cells
humoral immunity is mediated by _ lymphocytes and is the mechanism of defense against ______ ______
B
extracellular microbes
Cell-mediated immunity is mediated by _ lymphocytes and their products, such as _____ and is the mechanism of defense against _________ ______
T
cytokines
intracellular microbes
explain what passive immunity is
transferring of antibodies or effector cells
_______ are the only cells capable of specifically recognizing antigens and are thus the principal cells of adaptive immunity
Lymphocytes
Antigen-presenting cells capture microbial antigens, they display them to be recognized by _______
lymphocytes
what cell type do lymphocytes differentiate into to eliminate antigens?
effector cells
__________ help macrophages to eliminate ingested microbes and help B cells to produce antibodies.
CD4+ helper T lymphocytes
_________ kill cells harboring intracellular pathogens, thus eliminating reservoirs of infection
CD8+ CTLs
antibodies are the products of?
B lymphocytes
pathogen-associated molecular patterns (PAMPS) are a part of ____ immunity
innate
what are the three kinds of receptors in innate immunity?
a. Toll-like receptor
b. S-methylamine receptor
c. N-formyl methionyl receptor
d. Risperidone receptor
e. Mannose receptor
a,c,e
what are the two kinds of receptors in adaptive immunity?
Ig receptors
TCR receptors
name the three Cytosolic pattern recognition receptors and what they do
- RIG-like receptors (RLRs): recognize viral RNA
- cytosolic DNA sensors (CDSs): recognize bacterial cell wall constituents and also sense intracellular crystals, reactive oxygen species
- NOD-like receptors (NLRs): same recognition as CDSs