19.3 Flashcards
what is local vasoconstriction
due to high blood pressure in one artery the blood goes through other arteries to get to its destination
what is systemic vasoconstriction
when there is high blood pressure all around that the blood is unable to go through different arteries to bypass quicker
this promotes diffusion of nutrients of gas
whats vasomotion
slow flow of blood through capillaries
what is bulk flow
movement of fluids across capillary walls causing continuous mixing between plasma and interstitial fluid
what is hydrostatic pressure
force of fluid against a membrane
what is capillary hydrostatic pressure
capillary blood pressure that tends to force fluids through capillary wals
what is interstitial fluid hydrostatic pressure
pressure pushing fluid back into the blood vessel
assumed to be zero because lymphatic vessels drain interstitial fluid
what is colloid osmotic pressure
force opposing hydrostatic pressure created by the presence of non-diffusible molecules that prevent flow into capillaries
what is capillary colloid osmotic pressure
sucking pressure created by non-diffusible plasma proteins pulling water back into the capillaries
what is interstitial fluid colloid osmotic pressure
inconsequential because interstitial fluid has a very low protein content
what happens when hydrostatic pressure meets net colloid osmotic pressure
fluids will leave capillaries - filtration
what happens when net colloid pressure exceed hydrostatic pressure
fluids enter the capillaries - reabsorption
what is an edema
an abnormal increase in the amount of interstitial fluid
what happens in an increase in capillary hydrostatic pressure
accelerates fluid loss from blood
what happens in an increase in interstitial fluid osmotic pressure
inflammatory response
