Structure of the capillaries
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Very narrow lumen for short diffusion distance, single layer of cells so it
can lie very close to the cells. joins the arteries and venules together,
medium pressure, large surface area
Why is a double closed circulatory system good
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Substances needed can be delivered rapidly to cells as the blood is given
an extra boost which decreases the time taken for the blood to circulate
around the whole body.
,What are the ethical issues involving using invertebrates
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unethical to cause distress or suffering to any aliving organism. they cannot
give consent and may be subjected to painful procedures. its more
accetable than using verterbrates as they are simpler organisms, they have
a less sophisticated nervous system
Structure of the arteries
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Thick walls, muscular, elastic tissue in walls, narrow lumen, no valves. No
valves as it carries blood under high pressure. Elastic tissue allows them to
recoil
Why do polysaccharides and disaccharides take longer to increase blood sugar
levels
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They need to be digested first
Closed circulatory system
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, Blood is enclosed in tubes.
Side effects of antihypertensives
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dizziness, abnormal heart rhythm, headaches
How can you increase the validity of the results
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controlling variables so only one variable is being tested. having control
groups
Dangerous positive feedback
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Plaque makes the arteries narrower so blood flow is restricted and the
blood pressure increases
Why is exercise done
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, Exercise uses energy so longer exercise causes more weight loss. Weight
loss depends on energy input being lower than energy output. Exercise
increases metabolism
balanced energy budget
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energy input = energy output
Treatment to reduce high blood pressure
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ACE inhibitors, calcium channel blockers, diuretics
How can an atheroma increase the risk of thrombosis in arteries
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An atheroma can rupture the endothelium fo an artery, damaging the wall
and leaving a rough surface. This triggers thrombosis at the rupture site
Fibrin
Give this one a try later!
Give this one a try later!
Very narrow lumen for short diffusion distance, single layer of cells so it
can lie very close to the cells. joins the arteries and venules together,
medium pressure, large surface area
Why is a double closed circulatory system good
Give this one a try later!
Substances needed can be delivered rapidly to cells as the blood is given
an extra boost which decreases the time taken for the blood to circulate
around the whole body.
,What are the ethical issues involving using invertebrates
Give this one a try later!
unethical to cause distress or suffering to any aliving organism. they cannot
give consent and may be subjected to painful procedures. its more
accetable than using verterbrates as they are simpler organisms, they have
a less sophisticated nervous system
Structure of the arteries
Give this one a try later!
Thick walls, muscular, elastic tissue in walls, narrow lumen, no valves. No
valves as it carries blood under high pressure. Elastic tissue allows them to
recoil
Why do polysaccharides and disaccharides take longer to increase blood sugar
levels
Give this one a try later!
They need to be digested first
Closed circulatory system
Give this one a try later!
, Blood is enclosed in tubes.
Side effects of antihypertensives
Give this one a try later!
dizziness, abnormal heart rhythm, headaches
How can you increase the validity of the results
Give this one a try later!
controlling variables so only one variable is being tested. having control
groups
Dangerous positive feedback
Give this one a try later!
Plaque makes the arteries narrower so blood flow is restricted and the
blood pressure increases
Why is exercise done
Give this one a try later!
, Exercise uses energy so longer exercise causes more weight loss. Weight
loss depends on energy input being lower than energy output. Exercise
increases metabolism
balanced energy budget
Give this one a try later!
energy input = energy output
Treatment to reduce high blood pressure
Give this one a try later!
ACE inhibitors, calcium channel blockers, diuretics
How can an atheroma increase the risk of thrombosis in arteries
Give this one a try later!
An atheroma can rupture the endothelium fo an artery, damaging the wall
and leaving a rough surface. This triggers thrombosis at the rupture site
Fibrin
Give this one a try later!
