Body Fluid Compartments Flashcards
(49 cards)
Fluid shift disturbances involve an increase or decrease in what fluid volume?
Extracellular Fluid Volume (ECF)
Volume contraction
DECREASE in ECF volume
Volume expansion
INCREASE in ECF volume
Fluid shift disturbances can involve a change in body fluid _____
Osmolarity
What is osmolarity?
Concentration of particles in a fluid
Isosmotic
No change in body fluid osmolarity
Hyperosmotic
Increase in body fluid osmolarity
Hyposmotic
Decrease in body fluid osmolarity
60-40-20 rule
60% of body weight is total body water
40% of body weight is ICF (intracellular fluid)
20% of body weight is ECF (extracellular fluid)
What makes up the Extracellular Fluid (ECF)?
80% Interstitial Fluid
20% Plasma
Interstitial fluid and Plasma make up?
ECF
All exchanges of water and other things between the ICF and external world must occur through?
ECF
What part of the ECF can you control directly that will in turn, regulate the rest of the ECF?
Plasma
These contain covalent bonds that prevent them from dissociating in water
Nonelectrolytes
- glucose, urea, lipids
Do Nonelectrolytes have electrical charges?
NO
These dissociate into ions in water
Electrolyes
- Na+, K+, Mg2+, Cl-
Nonelectrolytes or Electrolytes… which have the GREATER ability to cause a fluid shift?
Electrolytes
What electrolytes are higher in the ECF?
Na+
Cl-
HCO3-
What electrolytes are higher in the ICF?
K+
Phosphate ions
Proteins
What maintains blood pressure?
ECF volume
What maintains swelling or shrinking of a cell?
ECF osmolarity
What is the normal value of a cell’s NaCl concentration?
0.85%
Isotonic solution has a what type of NaCl concentration?
= 0.85%
When a cell is placed in an Isotonic solution, what is the net movement of water?
Equally in and out of the cell
