Membrane Transport Flashcards
The cation in high concentration in the extracellular fluid is?
Na+ (Sodium)
Substances moving between the plasma and interstitial fluid must cross the__________?
Capillary wall
The cell membrane contains______where some traverse the cell membrane and act as channels, while some do not traverse and act as receptors or enzymes.
Proteins
The transport mechanism described as the random molecular movement of molecules is called______?
Simple Diffusion
The transport mechanism which requires energy and moves substances against the concentration gradient is______?
Active Transport
What are the two factors that are indirectly proportional with the rate of diffusion in the Fick’s Law?
MW (Molecular Weight) & Membrane Thickness
_____is the net diffusion of water.
Osmosis
The normal osmolality of ECF and ICF is ____milliosmoles per kilogram of water.
300
______solutions, water diffuses out of the cells and the cells shrink or undergo plasmolysis.
Hypertonic
2/3 of the total body water volume. Material moving into and out of the ICF must across the cell membrane.
Intracellular Fluid
1/3 of the body fluid volume.
Extracellular Fluid
Lies between the circulatory system and the cells, is 75% of the ECF volume.
Interstitial Fluid
The liquid matrix of blood, is 25% of the ECF volume.
Plasma
What are the function of the Cell Membrane?
Selective Transport
Cell Recognition
Cell Communication
Tissue Organization
Enzymatic Activity
Cell Shape Determination
A Molecules into and out of the cell
Selective Transport
