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NRTC A&P Ch 16

Lymphatic & Immune Systems

What do cytotoxic t-cells do? Carry out the attack
What do helper t-cells do? Support cytotoxic t-cells, secrete chemicals to trigger chemotaxis
What do memory t-cells do? Remember the pathogen in case of future invasion.
How do the B-cells stop antigens? Secreting antibodies that stop antigens.
What is an allergy? Hypersensitivity of the immune system to an environmental substance that normally is not a problem.
What is an allergen? An environmental substance that normally is not a problem.
What is produced upon the first exposure to an allergen? Immunoglobulins (IgG) (Antibodies)
Mast cells release what? Histamine
What is an immediate allergic reaction? A reaction that happens right away
What is a delayed allergic reaction? A reaction that occurs slowely
What determines if an allergic reaction will be immediate or delayed? The person's immune system.
What is anaphylaxis? Severe, immediate allergic reaction that affects the whole body.
What are signs and symptoms of anaphylaxis? Constriction of airways vasodilation Red, itchy, raised rash swelling of face, lips, tongue
What is anaphylactic shock? Immediate allergic reaction that worsens to the point of circulatory shock and maybe even sudden death.
Created by: bpeters



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