10. Compartments Flashcards
What is physiology?
Concerns intself with normal function
What is pathophysiology?
Deals with disease and abnormal function
What are the two different body systems?
Systems based on functional description
System based on topographical description
What are the two types of body fluid and how much of each?
Intracellular fluid (2/3) Extracellular fluid (1/3)
What are the different types of ectracellular fluid?
Intersitial fluid
Plasma
Transcellular fluid
How is body fluid composition achieved?
Through ion pumps
Transporters
Osmosis
What is osmosis?
Causes H20 to move from low solute concentrations to high solute concentration
What does osmosis require?
Solute concentration gradient
Semipermeable membrane
What is osmotic pressure?
the maximum pressure of a solution against a semipermeable membrane (to prevent water from flowing inward across the membrane
What is meant by tonicity?
The measure of this pressure and is dependent on how permeable the membrane is to solute
What is meant by isotonic?
Osmotic pressure of the solution outside the cells is the same as the pressure on the inside of the cytoplasm of the cell
What is meant by hypertonic?
The osmotic pressure of the solution outside the blood cells is higher than the osmotic pressure inside the blood cells
What is meant by hypotonic?
The osmotic pressure of the solution outside the blood cells is lower than the osmotic pressure inside the blood cells
What are essential indicator properties?
be nontoxic
be rapidly and evenly distribute throughout the nominated or relevant compartment
not enter any other compartment (no leak
not be metabolised
not be excreted (or excretion is able to be corrected for) during the equilibration period
be easy to measure
not interfere with body fluid distribution
