How does fluid move through the capillaries?

The primary force driving fluid transport between the capillaries and tissues is hydrostatic pressure, which can be defined as the pressure of any fluid enclosed in a space. Thus, fluid generally moves out of the capillary and into the interstitial fluid. This process is called filtration.

What causes movement in capillaries?

Roles of Capillaries Fluid movement across a capillary wall is determined by a combination of hydrostatic and osmotic pressure. The net result of the capillary microcirculation created by hydrostatic and osmotic pressure is that substances leave the blood at one end of the capillary and return at the other end.

What do hypotonic solutions do?

When a hypotonic solution is administered, it puts more water in the serum than is found inside cells. As a result, water moves into the cells, causing them to swell.

Does fluid exchange occur in the capillaries?

Capillaries are where fluids, gasses, nutrients, and wastes are exchanged between the blood and body tissues by diffusion. The net result is that fluid moves from the vessel to the body tissue. At the middle of the capillary bed, blood pressure in the vessel equals the osmotic pressure of the blood in the vessel.

What happens to the fluid filtered from blood capillaries?

What happens to the fluid filtered from blood capillaries? It becomes interstitial fluid, enters lymphatic vessels, and is returned to the bloodstream.

What two forces control the movement of fluid through the capillary wall?

What two forces control movement of fluid through the capillary wall? Blood pressure- causes fluids in the blood to move from capillary to tissue spaces. Osmotic pressure- tends to cause water to move in the opposite direction.

What happens during hypotonic?

In a hypotonic solution, the solute concentration is lower than inside the cell. Depending on the amount of water that enters, the cell may look enlarged or bloated. If the water continues to move into the cell, it can stretch the cell membrane to the point the cell bursts (lyses) and dies.

What does hypertonic fluid do?

Hypertonic fluids contain a higher concentration of solute compared to plasma and interstitial fluid; this creates an osmotic gradient and drives fluid from the interstitial space into the intravascular space.

Where does the extra fluid filtered out of the capillaries go?

Terms in this set (11) What happens to the fluid filtered from blood capillaries? A. It becomes interstitial fluid, enters lymphatic vessels, and is returned to the bloodstream.

Do capillaries use diffusion?

Diffusion, the most widely-used mechanism, allows the flow of small molecules across capillaries such as glucose and oxygen from the blood into the tissues and carbon dioxide from the tissue into the blood.

What causes hypotonic?

Hypotonic dehydration occurs when sodium loss is greater than water loss, resulting in a decrease in serum osmolality. This causes a shift of water from the extracellular space into the intracellular space. The cells swell and cerebral edema may occur.

Does hypotonic shrink or swell?

A hypotonic solution causes a cell to swell, whereas a hypertonic solution causes a cell to shrink.

How does pressure affect the movement of fluid in the capillaries?

In contrast, the movement of fluid from an area of higher pressure in the tissues into an area of lower pressure in the capillaries is reabsorption. Two types of pressure interact to drive each of these movements: hydrostatic pressure and osmotic pressure.

Where does fluid and cellular wastes enter the capillaries?

Fluid and the cellular wastes in the tissues enter the capillaries at the venule end, where the hydrostatic pressure is less than the osmotic pressure in the vessel. Filtration pressure squeezes fluid from the plasma in the blood to the IF surrounding the tissue cells.

How does hypertonic dehydration affect the clinical picture?

Dehydration also can result in various electrolyte imbalances that will affect the clinical picture and prognosis. Hypertonic dehydration occurs when water excretion from the body exceeds that of sodium excretion, resulting in increased sodium concentration in the extracellular fluid (hypernatremia).

What is normal hydrostatic pressure in the capillary bed?

The patient’s blood would flow more sluggishly from the arteriole into the capillary bed. Thus, the patient’s capillary hydrostatic pressure would be below the normal 35 mm Hg at the arterial end. At the same time, the patient’s blood colloidal osmotic pressure is normal—about 25 mm Hg.