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Biology-Related Homework Help Anatomy and Physiology Topic started by: summer88 on Sep 24, 2014



Title: ESV in blood pressure and blood flow if blood viscosity decreases
Post by: summer88 on Sep 24, 2014
9 give the response BEFORE any compensation occurs.

9.  How would ESV be affected if arterial blood pressure increased?  Why?



10.  A.  What happens to blood flow if blood viscosity decreases?


Title: Re: ESV in blood pressure and blood flow if blood viscosity decreases
Post by: padre on Sep 25, 2014
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Title: Re: ESV in blood pressure and blood flow if blood viscosity decreases
Post by: padre on Sep 25, 2014
10.  A.  What happens to blood flow if blood viscosity decreases?

The relationship between BP and viscosity is such that, given a constant systolic BP, if blood viscosity increases, then the total peripheral resistance (TPR) will necessarily increase, thereby reducing blood flow.  Conversely, when viscosity decreases, blood flow and perfusion will increase.  Because of the dependence of systemic arterial BP on cardiac output and TPR, if blood viscosity and TPR rise, systolic BP must then increase for cardiac output to be maintained.  Consequently, blood viscosity has been established as a major determinant of the work of the heart and tissue perfusion.  Since increased viscosity requires a higher BP to ensure the same circulating volume of blood, both the burden on the heart and the forces acting on the vessel wall are directly modulated by changes in blood viscosity.


Title: Re: ESV in blood pressure and blood flow if blood viscosity decreases
Post by: summer88 on Sep 26, 2014
Thank you very much!!!  ;D


Title: Re: ESV in blood pressure and blood flow if blood viscosity decreases
Post by: padre on Sep 27, 2014
You're very welcome :)