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AQA BIOL1 Biology Unit 1 Exam - 16th May 2011 Watch

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    (Original post by RoadRunner)
    What did people put for the time atria ventricular valves were closed ?? And why ??
    Time when the pressure in the atrium is lower than that of the ventricle.
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    (Original post by RoadRunner)
    What did people put for the time atria ventricular valves were closed ?? And why ??
    0.1 and 0.5

    Ventricles at a higher pressure than atria, so valvles close to prevent back flow?
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    (Original post by liviaaa)
    0.1 and 0.5

    ventricles at a higher pressure than atria, so valvles close to prevent back flow?
    yes i think i put that wooo hoooo buwa
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    Sounds about right, i think i over thought it and confused myself
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    I did 0.2-0.3 as they were the time when ventricular pressure increased.

    you're right though with 0.1-0.5
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    I expect the UMS to be 45 for an A and 55ish for full UMS
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    At the top it said " this is the time taken for one complete cycle"

    and the cycle was 0.7s, so 86BPM
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    what about for evaluating the vaccination?
    why was it good/bad?
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    i said the time for the atreoventricular closing 4rm 0.1 to 0.2....i guess upto 0.5 is right....for the vaccination i said....depends on herd immunity, side effects, storage, trained staff and economically viable.

    i dnt rememba wt i wrote for the beats per minute stuff....i rememba writin 60/0.7.....but nt the answer kmt -_- also for the last ques wrote quite a few points but not mitochondria and i said the glucose conc lower in lumen compared to blood (thts debatable)...the rest of it is fine. i reckon im losing 9 marks max...and im being really harsh.

    hopefulli 100 ums will be near 50 sumfin
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    I didnt write this but I think it is:

    (Number of deaths from breast cancer/total population) x100000
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    I put 0.0 - 0.5 fml
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    (Original post by karimshaheda)
    I didn't understand the simple questions, when you have to read off graphs..
    How did everyone work out the one where it was death rates amongst breast cancer people per 100000 or something?

    The question was like: 'How did scientists calculate the rate of deaths or something...'.
    i said hospitals data, sample (representative) or from entire population if possible....btw what did people write for the control of ph....wrote buffer. a mate of mine said put a lid :eek:
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    (Original post by karimshaheda)
    I didn't understand the simple questions, when you have to read off graphs..
    How did everyone work out the one where it was death rates amongst breast cancer people per 100000 or something?

    The question was like: 'How did scientists calculate the rate of deaths or something...'.
    Add together all the ages people died at, and divide by the total number (the mean.) Then equate it to per 100,000.
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    (Original post by Rahul.S)
    i said hospitals data, sample (representative) or from entire population if possible....btw what did people write for the control of ph....wrote buffer. a mate of mine said put a lid :eek:
    Lol,lid? Yeah it's buffer
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    (Original post by liviaaa)
    Add together all the ages people died at, and divide by the total number (the mean.) Then equate it to per 100,000.
    I said they calculated a ratio...
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    What about the "Can they say the fatty diet causes breast cancer deaths?" Or something like that...
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    (Original post by liviaaa)
    Lol,lid? Yeah it's buffer
    i guess a lid can work :rolleyes:
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    (Original post by liviaaa)
    What about the "Can they say the fatty diet causes breast cancer deaths?" Or something like that...
    Correlation doesn't equate to causation, other factors could have cause breast cancer..
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    (Original post by Rahul.S)
    i guess a lid can work :rolleyes:
    Hahaa..
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    (Original post by liviaaa)
    Hahaa..
    how many do you reckon u got wrong....max?
 
 
 
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