Physiology Cardiovascular Dynamics

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Parasympathetic stimulation of the heart primarily decreases heart rate and can influence cardiac output. However, it does not directly affect the Starling relationship, which describes the relationship between end diastolic volume (EDV) and stroke volume (SV). Increasing parasympathetic stimulation may lead to a lower heart rate, potentially allowing for greater filling time and increased EDV, but the intrinsic contractility remains unchanged. Conversely, decreasing parasympathetic stimulation would increase heart rate without altering the Starling Curve itself. Overall, while parasympathetic activity can impact heart rate and filling time, it does not alter the fundamental relationship defined by the Starling Curve.
Kurogashi
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Need help with this question:

Would parasympathetic stimulation of the heart affect the Starling relationship between end diastolic volume (EDV) and stroke volume (SV)? In other words, what would be expected to happen to the Starling Curve if you increased or decreased parasympathetic stimulation of the heart?

Thanks,
 
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Kurogashi said:
Need help with this question:

Would parasympathetic stimulation of the heart affect the Starling relationship between end diastolic volume (EDV) and stroke volume (SV)? In other words, what would be expected to happen to the Starling Curve if you increased or decreased parasympathetic stimulation of the heart?

Thanks,

What are your thoughts on this?
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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