Health & Disease (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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What is coronary heart disease (CHD)?
What is coronary heart disease (CHD)?
Narrowing/blocking of coronary arteries by fatty material buildup
Is CHD communicable?
Is CHD communicable?
Non-communicable (not infectious)
What are stents?
What are stents?
Metal mesh tubes inserted to keep arteries open
Advantages of stents (2)
Advantages of stents (2)
Lower heart attack risk & quick recovery time
What do statins do?
What do statins do?
Reduce LDL (bad) cholesterol levels
What type of cholesterol is LDL?
What type of cholesterol is LDL?
Bad cholesterol
What type of cholesterol is HDL?
What type of cholesterol is HDL?
Good cholesterol
Source of biological valve replacements
Source of biological valve replacements
Pigs or cattle
Lifespan of biological valve replacement
Lifespan of biological valve replacement
12-15 years
Disadvantage of mechanical valves
Disadvantage of mechanical valves
Requires lifelong medication to prevent blood clots
Purpose of artificial hearts
Purpose of artificial hearts
Temporary solution whilst waiting for donor heart
Why are artificial hearts less likely to be rejected?
Why are artificial hearts less likely to be rejected?
Metal/plastic not recognised as foreign by immune system
What is artificial blood made of?
What is artificial blood made of?
Saline solution
How much RBC loss can artificial blood handle?
How much RBC loss can artificial blood handle?
Up to two-thirds
Limitation of artificial blood
Limitation of artificial blood
Short-term use only; blood transfusion needed eventually