Flashcards in Chapter 16 Deck (34)
Protein receptors located in the plasma membranes of defensive cells (phagocytes)
Toll-like receptors (TLR)
Substances that increase phagocytosis.
What is a complement?
Protein that get rid of microorganisms.
First line of defense against microorganisms
-Skin (Sweat (lysozyme G+), dead cells, sebum)
Defense in the respiratory system.
Attaches to the cilia in the lungs and destroys them
B. pertussis (Whooping cough)
Second line of defense against microorganisms
-Phagocytes (Phagocytosis): neutrophils (arrive 1st), monocytes. (Phagocytosis: Ingestion and digestion of microorganism)
3 types of formed elements?
First to arrive at site of infection. Perform phagocytosis.
2 cell types that kill extraceularly?
-Natural killer lymphocytes
Antimicrobial substances, against pathogens.
Nonspecific chemical defenses
How long does it take to make antibodies?
About 2 weeks
Defenses in digestive system
-Low pH (Stomach acid)
Monocytes that cross to the tissues
Proteins that non specifically get rid of microorganisms.
Complement activation results in:
Antiviral proteins produced by animal cells after viral stimulation.
A type of antimicrobial peptides (AMP) produced by neutrophils, macrophages.
Name 3 phagocytes:
What types of defense mechanisms do the innate immune system use to combat extracellular pathogens?
What types of defense mechanisms do the innate immune system use to combat intracellular pathogens?
Combats worms in blood?
Results when chemicals called pyrogens trigger the hypothalamus to increase the body's core temperature
Anything that increases temperature.
Non specific defense is
The body's defenses against any kind of pathogen
Neutrophils attach to vascular linings and move out of the cells in a process known as
Margination is the process in which WBC......
Slow down, stop and attach to vessel walls
The primary phacoytes in the blood are