Respiratory gases, nutrients, and metabolic waste products move between the capillaries and interstitial fluid by the process of Blank______.
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Step 1: Identify the process by which substances move between the capillaries and interstitial fluid. Show more…
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Bulk movement of water across plasma membranes and the exchange of oxygen from blood into cells are similar in that the method of transport is by:
Adi S.
Exchange of nutrients, gases, and waste molecules occurs across capillary walls. Fluid is also exchanged. Most of the fluid is moved by hydrostatic pressure, which, in turn, is due to the pressure differences between the capillary fluid and interstitial fluid. Blood pressure, a type of hydrostatic pressure, is due to blood volume and the pressure generated by contraction of the ventricles. This pressure forces fluid out of the capillaries, especially at the end of the capillary. The blood within the capillaries contains plasma proteins that cannot leave the blood regardless of any concentration gradient between the blood and the tissue fluids. These molecules are responsible for the colloid osmotic pressure, which draws water into the capillaries, helping return fluids at the end of the capillary.
Fluids and small solutes are forced between cells of the vascular endothelium due to osmotic pressure
Maitreya E.
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