4.4 Cardiovascular: Resistance of the Arterioles

[saraihernandez]

Studying for USMLE step 1, thank you so mucho for this video!!!

[BananaBeecher]

Actually a legendary resource - extremely useful. Thanks so much.

[MikeB-spgp]

Thank you! I've just spent the past 90 minutes trying to understand Poiseuille's Equation, from Internet sources that are generally excellent (probably the case here- I just wasn't "getting it" for some reason).

But, the truth is, I didn't need to understand the equation. I just needed to understand the concepts you present here. What a relief!

And, BTW, I'm probably not your usual audience. I'm a 60 year old RN-- so you don't have to be a student to learn from you.

Please keep the videos coming.

[texastexas]

Very well done. Most professors don't explain this way to us.

[_immaculata]

This was exceedingly helpful. Thanks a lot. 💛

[bobboo]

concise and to the point. May God All Mighty bless you.

[jungandrea]

This is just amazing ❤️thank you so much💓💓💓

[vinurame]

Hi I have a quick question:
We know that the blood pressure drop is highest across the arteriole s, and so delta P should be higher in the arteries. Is it fair to say that, since arterioles are in parallel, collectively they have a lower resistance than the arterial resistance? That would support pressure being less in the arterioles wouldn’t it?

Individually, the resistances can certainly be higher in the arterioles supporting the point that they have the highest overall resistance.

[oal]

Doesnt resistance increase the pressure and lower the flow? How come the pressure then drops in arterioles?

[ronnynoneofyourbusinessgoo]

Fantastic actually. You can't use Ohm's straightforwardly to figure this out, can you?

[aggelosdidachos]

I am slightly confused with the last diagram.

"In the arterial system, as resistance increases, blood pressure increases and flow decreases." based on another source.

Which one is true then ? Pressure drops or increases when resistance increases?