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15 Cards in this Set
- Front
- Back
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What is the order of blood vessels? |
Arteries ( carry blood away from heart) ➡️ Arterioles ➡️ Capillaries ➡️ Veins (carry blood back to heart) |
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What are the features of Arterioles? |
•Thick muscle layer - restricting blood flow •Thin elastic layer - blood pressure low |
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What are the features of Arteries? |
• Thick muscle layer - constrict and dilate to control volume of blood • Thick elastic layer - maintain high blood pressure • high thickness of wall- resist vessel bursting • No valves - high pressure, no back flow |
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What's a double blind test and what's the advantage of it? |
Neither doctor nor patient knows who has the drug and who has the placebo Prevent bias |
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What's a double blind test and what's the advantage of it? |
Neither doctor nor patient knows who has the drug and who has the placebo Prevent bias |
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Why is this investigation a good model? |
• Smooth lining • No valves |
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Why is the investigation a bad model? |
• No elastic layer • No pressure from the heart |
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Why is it useful to have the same age group when investigating risk of CHD? |
• Risk of CHD increases overtime |
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Why is it useful to have the same age group when investigating risk of CHD? |
• Risk of CHD increases overtime |
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Why use healthy patients when investigating risk of CHD? |
• To out rule any other factors which increase the risk of CHD • e.g. Smoking, high saturated fats in diet |
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What human errors could make the investigation unreliable? |
• Reaction time of starting/stopping stop watch • The rate it takes to pour the water through the tube |
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What human errors could make the investigation unreliable? |
• Reaction time of starting/stopping stop watch • The rate it takes to pour the water through the tube |
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Why could the results be inaccurate? |
• Stopwatch may not be accurate • Not sure wherever all the water would flowed through • Use a measuring cylinder |
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Why is it inaccurate to do a histogram with < and > data? |
You don't know the width of the bars Also the data overlaps |
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Is it bad if your estimation 1+- on measuring cylinder? |
•No because it's only 1% difference • Some things have bigger errors |
