NUR 339 Exam 14
- Intracellular fluid (ICF)
- Extracellular fluid (ECF)
Answer Fluid within cells High concentration of potassium Small amounts of Ca, Na, Cl, bicarb, Mg, phosphate
Answer Fluid outside cells Plasma = 1/4 of ECF
Interstitial fluid = 3/4 of ECF Large amounts of Na and CL Small amounts of K, Mg, Ca, phosphate
- Diffusion
- Osmosis
Answer Movement of solutes from area of higher concentration to lower con- centration Restores balance by redistribution of electrolytes
Answer Movement of water from area of more water to less water.Fewer solutes to more solutes.Moves water through semi-permeable cell membrane
- Active transport
Answer Movement of solutes from area of lower concentration to higher concentration -- requires energy
- Osmolality 1 / 3
Answer Osmolar concentration in 1kg of water
Determined by sodium. Na pulls water with it. If sodium level goes up, osmolality level goes up.
- Tonicity
Answer Tension or effect that osmotic pressure of solution with impermeable solutes exerts on cell size because H2O movement across the cell membrane.
- Isotonic
- Hypotonic
Answer Same osmolality as body fluids. Fluid doesnt move in or out of cell.Cell size doesnt change
Answer Less concentrated inside the cell.
Fluids move INTO the cell from the blood. Cells swell.
- Hypertonic
Answer More concentrated inside the cell.
Fluids move OUT of the cell into the blood. Cells shrink. Poor skin turgor.
- Capillary filtration pressure
Answer AKA capillary hydrostatic pressure Reflects BP
-Pressure pushing water out of capillary into interstitial spaces
- High BP = high capillary filtration pressure (Pushes more fluid out)
- Low BP = low capillary filtration pressure 2 / 3
- Interstitial hydrostatic pressure
Answer Opposes movement of water out of capillary
-Maintains the movement
- Normally negative
- Capillary colloidal osmotic pressure
Answer Colloid = protein
Proteins are too large to pass thru pores/semi-permeable membrane of capillary wall. So they create their own pressure (osmotic) and just stay put.They pull water too them and into the capillary
- What condition would cause decreased capillary colloidal osmotic pres- sure?
Answer Malnutrition bc not getting adequate # of proteins
Liver disease bc a lot of proteins in liver Kidney disease bc kidneys release proteins into the urine
- Tissue colloidal osmotic pressure
Answer Pulls water out of capillary into interstitial spaces
- What condition would increase capillary filtration pressure?
Answer Edema Hypertension Congestive Heart failure CFP increased by increase in venous pressure & capillary distention caused by increased vascular volume
- What are the determinants of fluid shifts between the ICF and ECF?
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