Difference between Hydrostatic and Osmotic Pressure
- Definitions. Osmotic pressure is the pressure required to stop the movement of a fluid in a semi permeable membrane.
- Comparison Chart
- Hydrostatic vs Osmotic pressure. What is the difference between hydrostatic pressure and osmotic pressure? Both osmotic and hydrostatic pressure involve fluids.
What is the difference between pressure and hydrostatic pressure?
The pressure is the ratio of the force applied to the surface area over which the force is applied. Hydrostatic pressure is the pressure exerted by liquids.
How does osmotic pressure relate to hydrostatic pressure?
Osmotic pressure is defined as the hydrostatic pressure required to stop the flow of water, and thus, osmotic and hydrostatic pressures are, for all intents and purposes, equivalent. The membrane being referred to here can be an artifical lipid bilayer, a plasma membrane or a layer of cells.
Are osmotic pressure and hydrostatic pressure opposites?
The water passes from a high concentration outside of the vessels to a low concentration inside of the vessels, but equilibrium is never reached because the constant blood flow. Osmotic pressure works opposite to hydrostatic pressure to hold water and substances in the capillaries.
What is hydrostatic pressure in simple terms?
Hydrostatic pressure refers to the pressure that any fluid in a confined space exerts. If fluid is in a container, there will be some pressure on the wall of that container.
What is hydrostatic pressure also known as?
We know that matter in all states exerts pressure. Liquids and gases exert equal pressure on all sides of a container. The normal force exerted by a liquid per unit area of the surface in contact is called hydrostatic pressure or pressure of the liquid.
What happens when osmotic pressure is higher than hydrostatic pressure?
There will be an escape of water and solute into the interstitial space resulting in interstitial edema whenever the hydrostatic pressure is much higher than the osmotic pressure inside the intravascular space.
What type of pressure is hydrostatic pressure?
Hydrostatic pressure is the pressure exerted by a fluid at rest due to the force of gravity. It's the pressure you feel when you dive to the bottom of a swimming pool. Hydrostatic pressure applies to all fluids, meaning all liquids and gases (a fluid is any substance that can flow and change its shape).
What is the opposite of hydrostatic pressure?
Furthermore, oncotic pressure has the opposite effect of hydrostatic blood pressure. Oncotic pressure causes interstitial fluid movement into the blood capillaries.
What happens when osmotic pressure is higher than hydrostatic pressure?
There will be an escape of water and solute into the interstitial space resulting in interstitial edema whenever the hydrostatic pressure is much higher than the osmotic pressure inside the intravascular space.
What does hydrostatic pressure depend on?
Hydrostatic pressure is determined by the weight of fluid directly above a point of reference; the latter depends on the distance between the top of the water and the reference point and the density of the fluid (Figure 1(a)).
What is osmotic pressure inversely proportional to?
Statement - I : Osmotic pressure of a dilute solution is inversely proportional to its concentration provided temperature remains constant. Statement - II : Osmotic pressure is a colligative properly and depends upon the number of moles of solute dissolved in a definite volume of the solution.
What causes hydrostatic pressure to increase?
Increased elevation increases the amount of hydrostatic pressure. For example, the veins and capillaries in our feet have about 100 mm Hg more pressure inside than those at heart level. In an upraised hand, the hydrostatic pressure is about 50 mm Hg less than at heart level.
What is the difference between hydrostatic and osmotic pressure?
Hydrostatic pressure is the pressure experienced by a point inside the fluid. Osmotic pressure is the pressure that is needed to stop the fluid transfer of a semi permeable membrane. These concepts play a vital role in fields such as hydrostatics, biology, plant sciences and many other fields.
What does hydrostatic pressure mean?
The term “hydro” means water and the term “static” means non-changing. This means hydrostatic pressure is the pressure of the non-flowing water. However, this is also applicable to any fluid including gasses.
What is the inverse of osmotic pressure?
The inverse of osmotic pressure is known as water potential, which is the tendency of the solvent to stay in the solution. Higher the osmotic pressure, lower will be the water potential.
What happens to the pressure of the inside of the membrane?
The solvent will transfer to the inside of the membrane. This will cause the pressure of the inside of the membrane to rise. This risen pressure is known as the osmotic pressure of the system. This is a vital mechanism in transferring water to the inside of the cells. Without this mechanism, even trees cannot survive.
Is the pressure of a static fluid a force?
Therefore, the pressure of a static (non-flowing) fluid is dependent only on the density of the fluid, the gravitational acceleration, the atmospheric pressure and the height of the liquid above the point the pressure is measured. The pressure can also be defined as the force exerted by the collisions of particles.
Is osmotic pressure only present in a solution?
Osmotic pressure is only present in specific systems where the solution and the solvent are separated by a semi permeable membrane. • Osmotic pressure cannot occur only with a pure fluid. Two different concentrated solutions are required for osmotic pressure. Hydrostatic pressure can occur only with one fluid.
What Is Hydrostatic Pressure?
Hydrostatic pressure is the pressure that is exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity . Hydrostatic pressure increase in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above.
Why is osmotic pressure important?
Osmotic pressure reduces water potential which is the tendency of water moving from one area to another. Thus, it is necessary in plant cells for turgidity and support.
How does osmotic pressure affect the body?
In the Body. In the body, the hydrostatic pressure drives the material out of the capillary. In the body, the osmotic pressure brings the material back to the capillary.
How does hydrostatic pressure affect the density of the fluid?
Hydrostatic pressure is greatly influenced the density of the fluid in which it is being measured, atmospheric pressure, acceleration due to gravity and the level of fluid above the point of measurement. In the body, the hydrostatic pressure drives the material out of the capillary. Hydrostatic pressure is different in different levels ...
What pressure brings material back to the capillary?
The osmotic pressure brings the material back to the capillary.
What forces influence osmotic pressure?
There have to be two solutions with unequal levels of concentration. Osmotic pressure is greatly influenced by the adhesion (electrostatic forces) between the liquid (water or other) and some solid lattice, like a semi-permeable membrane. The osmotic pressure brings the material back to the capillary.
Is osmotic pressure a liquid or solid?
Osmotic pressure depends on interaction between liquid and solid. Osmotic pressure can only be present in special systems in which there are different concentrations of a fluid (solution and solvent) that are separated by a semi-permeable membrane. Osmotic pressure cannot be present in a solution with equal concentration.
Why does edema occur?
Edema occurs when the hydrostatic pressure is too high (more fluid is being pushed out of the blood vessel) or if the oncotic pressure is too low (there's less of a force pulling fluid back into the blood vessel). Low serum albumin could be one reason for edema occurring, since albumin's main purpose is to provide an oncotic pressure and loss of albumin decreases the oncotic pressure that pulls fluid back into the blood vessels.
What is the pressure created from blood pressure that pushes water and hydrophobic molecules into cells?
Hydrostatic Pressure is the pressure created from your blood pressure that pushes water and hydrophobic molecules into cells.#N#Osmotic Pressure is the gradient of water that is between the cells and capillaries. This gradient wants to push water into the capillaries.
What force drives fluid out of the capillary into the interstitial space?
The force that drives fluid out of the capillary into the interstitial space is primarily the hydrostatic pressure . The oncotic pressure of the interstitum plays only a small part. Along the length of the capillary, the hydrostatic pressure decreases while the oncotic pressure remains relatively the same; the net pressure (calculated using the Starling equation) is dependent on the values of both hydrostatic pressure and oncotic pressure and determines whether fluid is pushed out of the capillary or is pulled into the capillary.
Why does water move in the direction of the solute concentration?
Water will always move toward the higher solute concentration if it is able. Normally the osmotic pressure inside the vessel ( resulting from the higher solute concentration when compared to the interstitium) counteracts the outward movement of water due to the hydrostatic pressure. This causes water movement in the direction of whichever force is stronger.#N#If, however, the solute concentration on the outside of the blood vessel is higher than inside, water will not only be pushed out by the hydrostatic pressure, it will be drawn out by osmosis as well. In this example the osmotic and hydrostatic pressure both cause water movement in the same direction.
Is the oncotic pressure of the interstitial space the same as the oncotic pressure of the blood?
Actually, the oncotic pressure of the interstitial space is very little compared to the oncotic pressure of the blood vessel. Tissues themselves will have more proteins, etc. but these are not floating around in the interstitum; they are inside the cells.
Does oncotic pressure increase along the length of the capillary?
Oops, yea good catch. I was typing fast and I meant to write that it increases. The oncotic pressure of the capillary would increase along the length of the capillary since the concentration of the solutes increases (as fluid is pushed out into the interstitium). The rest of my info looks right though (I just checked it over to make sure heh).
