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AAMC bio 1 qpack passage 8 question 53
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Sukham_5277
#1 Posted : Monday, July 27, 2020 7:37:41 PM
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Hello,
I was wondering if you could explain how cardiac output and resistance to blood flow determine blood pressure

Thank you
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INSTR_Katerina_102
#2 Posted : Tuesday, July 28, 2020 7:25:51 AM
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Hi Sukham,

I unfortunately don't have access to the AAMC question. Could you post the question for context?

Or would you just prefer a more general explanation?

Thanks,

Katt
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Sukham_5277
#3 Posted : Tuesday, July 28, 2020 2:31:54 PM
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Hi Katt
A more general explanation is good

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INSTR_Katerina_102
#4 Posted : Thursday, July 30, 2020 7:37:57 AM
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Hi Sukham,

"I was wondering if you could explain how cardiac output and resistance to blood flow determine blood pressure."

As far as I understand, similar to current in a circuit, blood pressure (dP), blood flow (Q) and resistance (R) are related by Ohm's law Q = dP/R.

Your cardiac output is going to push some volume of blood out, which will exert some force on the area of your blood vessels, which should result in some pressure. Thus Q and dP are directly proportional.

R will decrease pressure and flow as it is a force resisting this flow/pushing of blood through the vessels. As a result, it is inversely proportional to Q.

Please let me know if this addresses your problem.

Katt
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