Unit 1 Flashcards
The neutrophil count increases during the inflammatory process, especially with _______ infections
bacterial
Leukocytosis is elevated especially with _____ and _____
bacterial infections and tissue injury
Immature forms of neutrophils are called ______, because of the horseshoe shape of their nuclei
bands
Largest of the circulating leukocytes
macrophages
Arrive at inflammatory site shortly after the neutrophils and perform their phagocytic functions for several days
monocytes/macrophages
Important in inflammation associated with immediate hypersensitivity reactions and allergic disorders
eosinophils, basophils and mast cells
Bind to immunoglobulin E (IgE), triggoring the release of histamine and vasoactive agents from the basophil granules
Basophils and mast cells
Circulate in the blood and are recruited to tissues, similar to neutrophils. Increase during allergic reactions and parasitic infections.
Eosinophils
Secretes histamine (type of WBC)
Mast cells
Causes dilation of arterioles and increases permeability of venules, acts at the level of microcirculation by binding to (H1) receptors on endothelial cells
Histamine
Promote platelet aggregation and vasoconstriction (inflammatory mediator)
Prostaglandins (ASA/NSAIDS block prostaglandin synthesis, helping reduce inflammation)
Inflammatory mediator that effects permeability of postcapillary venules, adhesion properties of endothelial cells, and extravasation/chemotaxis of neutrophils, eosinophils and monocytes- slow reacting substance of anaphylaxis
Leukotrienes (LT)
TNF-(alpha) and IL-1 are examples of two major _____
cytokines
Features of the release/stimulation of this protein include systemic responses like fever, hypotension, tachycardia, anorexia, release of neutrophils into circulatin and increased levels of corticosteroid hormones
Cytokines
Acute inflammatory reactions are characterized by ______ and ______
vascular changes and leukocyte infiltration
3 phases of wound healing
inflammatory, proliferative and wound contraction/remodeling
transmis infection by self-propagation, no genetic material present
prions
smallest obligate intracellular pathogens with no organized cellular structures
viruses
incapable of replicating outside of a living cell
virus
autonomously replicating unicellular organisms- prokaryotes- lacking an organized nucleus
bacteria
spherical bacteria
cocci
bacteria with cell wall composed of peptidoglycan
gram positive
bacteria with outer membrane composed of lipopolysaccharide
gram negative
cocci in chains
streptococci
cocci in pairs
diplococci
cocci in clusters
staphylococci
Cells that are the bridge between the innate and adaptive immune systems
Dendritic Cells (DCs)
Cell membrane contains different types of protein and carbohydrate molecules embedded in a semipermeable phospholipid bilayer
Fluid Mosaic Model
diffusion and osmosis
passive transport
process by which substances become widely dispersed and reach a uniform concentration because of the energy from their spontaneous kinetic movements
diffusion
regulated by the concentration of substances (besides water) on either side of the membrane that cannot diffuse across the membrane through open ion channels- water moves through auqaporins
osmosis
Has higher concentrations of sodium, calcium and chloride
Extracellular fluid
Has higher concentrations of potassium
Intracellular fluid
• Input and use of energy- movement within a cell- focus on concentrations of substances that are needed on either side of the cell
Active transport
process by which cells surround and take in materials from their surroundings
Endocytosis