water balance Flashcards
How is blood volume and viscosity(thickness) controlled?
amount of water
water is distributed between two major fluid compartments named:
- Intracellular fluid
- Extracellular fluid
Hydrostatic pressure is
physical force resulting in net movement of fluid (incl water) in one direction–>pushes
osmotic pressure is
a chemical force resulting in net movement of water in one direction –> pulls ( water moves to higher concentration)
how does water diffuse
through interstitial clefts at capillary beds
water diffuses toward the ______ concentrated area.
higher
hydrostatic pressure (movement of fluid) moves from _____ to _____ pressure
high to low
what forces drive the movement of water at capillary bed?
hydrostatic pressure and osmotic pressure
net pressure out of bed =
filtration
net pressure into bed=
absorption
if net filtration pressure is positive then that means..
water will move out of capillary
if net filtration pressure is negative then..
the water will move into capillary
Out of capillary equation
blood hydrostatic pressure HPc + osmotic pressure (IF) OPif
into capillary equation
blood osmotic pressure OPc + Hydrostatic pressure (IF) HPif
net filtration pressure (OUT-IN)
(HPc+OPif) - (OPc+HPif)
