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Higher Human 2001 Past Paper Question - HSN forum

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Higher Human 2001 Past Paper Question


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#1 Hev

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Posted 14 May 2006 - 05:10 PM

2001 Higher Human

Section B Question 7a (iii)

When the total voume of blood leaving the heart in one minute when the rate of oxygen uptake is 1.6 litres/minute?

from the graph the stroke volume is 150cm^3
and the bpm is 110

the offical answer is 16.5litres/min

but i have *no* idea how to get to that

can anyone help explain it to me?

thanks xx
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#2 Hev

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Posted 14 May 2006 - 05:21 PM

i sat for ages and couldn't work it out and now i posted it i got it

trust me

150cm^3 needs to be converted into litres = 0.15 mulitplied by the bpm which gives 16.5litres/min

sorry, i'm embarrased now hehe
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#3 Ally

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Posted 14 May 2006 - 05:22 PM

Cardiac Output = Stroke Volume * Heart Rate
Cardiac Output = 0.15litres * 110
Cardiac Output = 16.5litres/min

Edit: Oh, you got it now. smile.gif

#4 Hev

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Posted 14 May 2006 - 05:35 PM

yeah after like half an hr, and i've done this question before

sometimes i can be so dense

but i appreciate the help all the same [:
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#5 werlop

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Posted 14 May 2006 - 07:32 PM

Some other relationships which might be useful here are

Arterial Blood Pressure = Cardiac Output x Total Peripheral Resistance

CO = (ABP-MSFP)/TPR
VR = (MSFP-RAP)/RvR
CO=VR


And to measure cardiac output you would use the Fick method (probably indirect, using some sort of respiratory apparatus) or perhaps an indicator dilution method such as the Stewart Hamilton method.
Click here to visit the Bearsden Academy Website
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!

#6 Hev

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Posted 14 May 2006 - 09:50 PM

thanks for the information i'm sure it will come in handy [:
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#7 xXxHeatherxXx

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Posted 21 May 2006 - 08:37 PM

No it won't.

#8 Hev

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Posted 21 May 2006 - 08:38 PM

that was a bit blunt
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#9 werlop

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Posted 21 May 2006 - 09:12 PM

QUOTE(xXxHeatherxXx @ May 21 2006, 09:37 PM) View Post

No it won't.


It will if you are going on to do any form of medicine which people sitting human biology have a higher than average potential to do.
Click here to visit the Bearsden Academy Website
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!

#10 Hev

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Posted 21 May 2006 - 10:09 PM

exactly, what exactly was the point of saying it anyway?

you don't deserve to be my name same biggrin.gif
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