# What is the difference between hydrostatic pressure and osmotic pressure?

## What is the difference between hydrostatic pressure and osmotic pressure?

Hydrostatic pressure is the force of the fluid volume against a membrane, while osmotic pressure is related to the protein concentration on either side of a membrane pulling water toward the region of greater concentration.

What is the formula in calculating the osmotic pressure?

pi=iMRT
The equation for osmotic pressure is pi=iMRT. The higher the concentration (M) or the temperature (T) of a solution, the higher the osmotic pressure.

What is the formula to calculate net hydrostatic pressure?

To calculate NFP, we subtract the forces that oppose filtration from the GBHP. A normal NFP (using the figures mentioned) would be: NFP=55-(15+30)=55-45=10mm Hg. This means that a pressure of only 10mm Hg causes a normal amount of plasma (minus plasma proteins) to filter from the glomerulus into the capsular space.

### What happens if osmotic pressure is high?

(c) When cells are placed in a concentrated salt solution with an osmotic pressure greater than that of the intracellular fluid, the rate of flow of water out of the cells is greater than the rate of flow into the cells. The cells shrivel and become so deformed that they cannot function.

What is another name for hydrostatic pressure in the body?

The pressure that blood exerts in the capillaries is known as blood pressure. The force of hydrostatic pressure means that as blood moves along the capillary, fluid moves out through its pores and into the interstitial space.

What is the value of glomerular hydrostatic pressure?

In blood vessels supplying the renal corpuscles, the average hydrostatic pressure is about 1 kPa. The average hydrostatic pressure falls to a value of 0.04 kPa within the postcardinal vein efferent to the renal corpuscle. Within the glomerular capillaries the hydrostatic pressure averages 0.21 kPa.

## What causes hydrostatic pressure?

Hydrostatic pressure in blood vessels is caused by the weight of the blood above it in the vessels. Hydrostatic pressure is the pressure exerted by a fluid at a given point, due to the weight of the fluid above it.

What is the formula for hydrostatic force?

Hydrostatic force is the product of pressure and area. Expressed mathematically, the equation is F = P x a. The balancing or offsetting of hydrostatic force is achieved by exposing opposing areas to the same pressure.

What is capillary osmotic pressure?

Osmotic Pressure. The net pressure that drives reabsorption—the movement of fluid from the interstitial fluid back into the capillaries—is called osmotic pressure (sometimes referred to as oncotic pressure). Whereas hydrostatic pressure forces fluid out of the capillary, osmotic pressure draws fluid back in.