10.1: fluid balance

what does ICF stand for?

intracellular fluid

what makes up ICF?

cytosol inside cells

what does ECF stand for?

extracellular fluid

what makes up ECF?

interstitial fluid of tissues and plasma

what is included in ECF?

blood, lymph, interstitial fluid, cerebrospinal fluid (CSF), synovial fluid, serous fluids, aqueous humor

what is the greatest source of fluid loss?

urination

what percent of fluid loss is through urination?

60%

what makes up the 40% of fluid loss?

insensible fluid loss through skin, sweat, feces

what percent of fluid intake is through beverages?

60&

what percent of fluid intake is through food?

30%

what percent of fluid intake is through metabolism?

10%

what is fluid shift?

the water movement between ECF and ICF

what is dehydration?

water loss > water gain

what happens during dehydration?

ECF loses water

what direction does water move during dehydration?

ICF into ECF

what is overhydration?

water loss < water gains

what direction does water move during overhydration?

ECF into ICF

what rule does concentration always follow?

high moves to low

what are the effects of dehydration?

cells/blood becomes too concentrated to function, some cells will die without enough water

what are the effects of over hydration?

solute concentration is too low, cells can burst

what is solute intake?

solute gains > solute losses

what happens during solute intake?

ECF concentration increases (ECF > ICF)

what direction does fluid shift occur in solute intake?

ICF into ECF

what is solute loss?

solute gains < solute losses

what happens during solute loss?

ICF concentration increases (ECF < ICF)

what happens during solute overconsumption?

increase in blood concentration, blood volume and pressure

what direction is fluid shift during overconsumption?

ICF into ECF

what happens during solute underconsumption?

decrease in blood concentration, blood volume, and pressure

what direction is fluid shift in underconsumption?

ECF into ICF

what happens to fluid shift when you add water or take away solutes?

goes into the cell (ECF moves to ICF)

what happens to fluid shift if you take water away or add extra solutes to the body?

goes out of the cell (ICF moves to ECF)