Qualification > Sciences

Paper 1 Bio doubt

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IGCSE nightmare:
Can I have an explanation for the answer? :-[

[Spy]:
this question was withdrawn from the examination anyways.

but here'sthe solution.

if atrio-ventricular valves close then this means that blood has already flown into the ventricles and pressure is growing in it. which is from 1-2 in the graph, it also could mean that blood is being filled into the atria from the pulmonary veins and therefore pressure in the ventricle is decreasing beacuse all the blood it has is passing to aorta which is from 3-4on the graph. so you add those times, they add up to 0.07s which is C

but like i said, it was with drawn from the examination because no one was able to read the graph properly.

unknown 101:

--- Quote from: hesho21 on May 24, 2010, 06:32:23 am ---Man that was great :D I'm sorry yeh they were a lot of questions :D Anyway if u want aanything just post it up here and I'll be glad to help :)

--- End quote ---

any time ;)

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