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Created by: jatyization
Created on: 12-05-14 18:17

How does the heart muscle and heart valves maintain one way blood flow from the atrium to the aorta?

Atrium has higher pressure than ventricle; Atrioventricular valve opens; Ventricle has higher pressure than atrium; Atrioventricular valve closes;Ventricle has higher pressure than aorta; Semilunar valve opens; Higher pressure in aorta than ventricle

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How does a vaccine lead to a person developing immunity to a pathogen?

Vaccine contains attenuated pathogen; T-cells activate B-cells; B-cells divide by mitosis; B-cells produce antibodies; Memory cells produced; More antibodies produced in secondary immune response

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Front

How does a vaccine lead to a person developing immunity to a pathogen?

Back

Vaccine contains attenuated pathogen; T-cells activate B-cells; B-cells divide by mitosis; B-cells produce antibodies; Memory cells produced; More antibodies produced in secondary immune response