Hydrostatic/Osmotic Pressure blood question

[onedirection]

Just a weird thing that I had in my notes that wasn't making too much sense

I have this verbatim and I'm having trouble making sense of it

Hydrostatic > Osmotic

Hydrostatic --> If blood is inside --> Fluid therefore flows out of capillary

Artery > Venule end for hydrostatic pressure

Venule end has fluid flow into the capillary [This part confuses me because I thought no backflow was allowed and i thought the flow goes from arteries to veins, therefore why would fluid flow back into the capillaries when there are valves to prevent backflow]

Osmotic pressure --> Arteriole end = Venule end in pressure

Are these notes correct? I'm not sure exactly what the Hydrostatic blood inside, fluid flows out capillary was trying to get it. I think it's what's supposed to happen if Hydrostatic was > Osmotic

but again could someone clarify/fix up any issues I had in these notes


Also side question: Can Hemoglobin hold CO2?

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[rfvbnmju]

Just a weird thing that I had in my notes that wasn't making too much sense

I have this verbatim and I'm having trouble making sense of it

Hydrostatic > Osmotic

Hydrostatic --> If blood is inside --> Fluid therefore flows out of capillary

This is correct.

Artery > Venule end for hydrostatic pressure

To clarify, artery end of the capillary bed has greater hydrostatic pressure than venue end of the capillary bed hydrostatic pressure.
This is important since capillary bed is where gas/nutrient exchange takes place.

Venule end has fluid flow into the capillary [This part confuses me because I thought no backflow was allowed and i thought the flow goes from arteries to veins, therefore why would fluid flow back into the capillaries when there are valves to prevent backflow]

The hydrostatic pressure forces the fluid out of the capillary while the osmotic pressure pulls fluids back in.
At the capillary bed in the artery side, the hydrostatic pressure is greater than osmotic pressure so the fluids leak out of capillary into the interstitial space.

At the end of capillary bed in the vein end, hydrostatic pressure drops due to greater area of the capillary bed.
Since hydrostatic pressure is now lower than osmotic pressure, what happens is the fluid that is forced out in the interstitial space before is now pulled back into the capillary blood vessel.

Osmotic pressure --> Arteriole end = Venule end in pressure

Are these notes correct? I'm not sure exactly what the Hydrostatic blood inside, fluid flows out capillary was trying to get it. I think it's what's supposed to happen if Hydrostatic was > Osmotic

but again could someone clarify/fix up any issues I had in these notes

Yes osmotic pressure in the vessel is determined by how much stuff (proteins specifically albumen) is in the blood.

It more or less stays constant from artery to vein. It's hydrostatic pressure that drops from artery to vein end.

Also side question: Can Hemoglobin hold CO2?

Off the top of my head, I think CO2 allosterically bind to Hb and causes a conformation change in Hb that cause Hb to bind less to O2. This is important because once more CO2 binds to Hb, it means there are more CO2 due to increase metabolically/physical activity so Hb wants to bind less to O2 to unload more of it to the cells that needs it. This is also why in physical activity since you're trying to get more O2 for your cells.

Hope that helps.