Principles of Membrane Transport I: Simple Diffusion Flashcards
1
Q
Describe the role of cell membranes
A
Selective barrier- responsible for concentration gradients
Determines what stimulates the cells
2
Q
Describe the molecular structure of cell membranes
A
Hydrophilic and hydrophobic end Hydrophilic (head)- ethanolamine, phosphate, and glycerol Charged and faces water Hydrobic (tail)- fatty acid tails Uncharged and forms phospholipid bilayer
3
Q
Define Diffusion
A
Net displacement of mater from one region to another to due random thermal motion
4
Q
Difference between steady state and equilibrium
A
It takes energy for steady state to remain constant over time
