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extracellular fluid
interstitial fluid, plasma, intravascular fluid, CSF, sweat, urine, etc.
store less fat, higher metabolic rates, and greater evaporative loss
why are infants more susceptible to significant total body water loss
renal
what mechanisms are not mature enough that regulate fluid and electrolyte conservation; leads to
dehydration
adipose cells
individuals with more body fat have proportionately less total body water because very little water is
contained here
hydrophobic
is fat hydrophobic or hydrophillic?
total body water
this declines with age due to increased fat, decreased muscle, and by the reduced ability to regulate
sodium and water
, albumin
plasma protein that is primarily responsible for the plasma oncotic pressure because of its high
concentration
starvation or malnutrition
because of these phenomenons, the lower levels of plasma proteins cause fluid to move into the
interstitial space and results in edema
edema
excessive accumulation of fluid within interstitial spaces; does not always indicate fluid excess since it is
often a probolem of fluid distribution
aquaporins
a family of water channel proteins that facilitate the passage of water freely via diffusion
osmosis
how water moves between the ICF and ECF compartments
starling hypothesis
Net filtration is equal to the forces favoring filtration minus the forces opposing filtration
forces favoring filtration
Capillary hydrostatic pressure (blood pressure) and interstitial oncotic pressure (water pulling)
forces opposing filtration
capillary (plasma) oncotic pressure and interstitial hydrostatic pressure