Hi Everyone,
I'm not sure if this exact question has been posted before, so I'll try it here.
When thinking about the Ideal Gas Law (pv=nrt), pressure and volume are inversely related. But does that hold only for ideal gas laws?
For example, when water is reabsorbed from the filtrate back to the blood, this causes a rise in BOTH blood volume and blood pressure. From the stand-point of the equation above, you wouldn't predict that to happen.
Also, is there a general rule in terms of pressure changes for vasodilation and vasoconstriction? Once again thinking abou the gas law equation, you would think that vasoconstriction would decrease the area in the blood vessel and thus cause a rise in the bloood pressure. Is that correct? And does that relationship always hold? I could swear reading in some part of the body that vasodilation causes a rise in blood pressure -- but I'm not sure where.
Sorry for the long post and thanks!
I'm not sure if this exact question has been posted before, so I'll try it here.
When thinking about the Ideal Gas Law (pv=nrt), pressure and volume are inversely related. But does that hold only for ideal gas laws?
For example, when water is reabsorbed from the filtrate back to the blood, this causes a rise in BOTH blood volume and blood pressure. From the stand-point of the equation above, you wouldn't predict that to happen.
Also, is there a general rule in terms of pressure changes for vasodilation and vasoconstriction? Once again thinking abou the gas law equation, you would think that vasoconstriction would decrease the area in the blood vessel and thus cause a rise in the bloood pressure. Is that correct? And does that relationship always hold? I could swear reading in some part of the body that vasodilation causes a rise in blood pressure -- but I'm not sure where.
Sorry for the long post and thanks!
) I think this is how vasoconstriction works. Vasocontriction increases the blood pressure because the arterioles constrict to provide resistance and keep pressure off the capillaries. Therefore, the pressure upstream increases due to resistance or the constriction of the arterioles. Equation: Pressure = Flow X Resistance. It's also a way to manipulate blood flow to specific parts of the body.
