Fluid and Electrolyte Balance- Fluid shifts Flashcards
Intracellular fluid (fluid within cells) makes up about _____ of total body water
2/3
Extracellular fluid makes up ____ of total body water
1/3
Breakdown of extracellular fluid
Intravascular fluid (blood plasma) Interstitial fluid
Total body water is what percent of body weight?
60%
Best indicator of fluid balance in adults
Daily weight
The first stage of the sodium-potassium pump is _____ while the second stage is ______
Passive
Active
Hydrostatic pressure
The pressure against the walls of a compartment
Movement of fluids at the capillary level
Arterial end (hydrostatic pressure)
Pressure greater in capillary than in surrounding interstitial space
On the arterial end, fluids and solutes inside capillary are…
Forced out
Venous end (hydrostatic pressure)
Pressure less in capillary than in surrounding interstitial space
On the venous end, fluid and solutes..
Move into capillary
Oncotic pressure / colloid pressure / plasma oncotic pressure
Osmotic pressure due to proteins (albumin) specifically. Other substances can also cause osmotic pressures
What is the driving force behind diffusion across a semi-permeable membrane?
Osmotic pressure
Starling’s Law
Net filtration = Force favoring filtration - forces opposing filtration
On the arterial end of the capillary, hydrostatic pressure (______ _____ ___) of blood exceeds colloid osmotic pressure (______ _____ ___)
Pushing fluid out
Holding fluid in
