ELM 2.2 Flashcards
1
Q
Adolf Fick discovered what?
A
That the number of molecules moving across an interface is proportional to :
- the area of the interface
- the concentration gradient
2
Q
What are the basic diffusion laws for 1D, 2D, and 3D?
A
- 1D diffusion: movement along DNa
- 2D diffusion: movement in a membrane
- 3D diffusion: movement in a liquid (cytosol, extracellular fluid)
3
Q
What is the formula for current (I) ?
A
Volts (V) / Resistance (R) or Volts (V) x Conductance (where conductance = 1/R)
4
Q
The movement of ions through channels in the cell membrane is determined by:
A
the electrochemical gradient for the ion
