chapter one cell membrane structure. chapter two membrane transport
TRANSCRIPT
CHAPTER ONE
CELL MEMBRANE STRUCTURE
Cell membrane
Phospholipid molecule
Bilayer phospholipid
Bilayer membrane
Fluid mosaic model
CHAPTER TWO
MEMBRANE TRANSPORT
Cell connection
Molecular transport
Cell membrane transport
Simple diffusion
Facilitated diffusion
Ion channels are gated
They can also be inactivated
Facilitated and simple diffusion
Rate of diffusion
Glucose transport
Na, K-ATPase
Active cotransport
Na, glucose-symporter
Active co-transport: Na, glucose-transport
Osmosis
Phagocytosis
Endocytosis: pinocytosis
Receptor mediated endocytosis
Exocytosis
Any questions?
CHAPTER THREE
RESTING MEMBRANE POTENTIAL
Nernst equilibrium potentials
Goldman equation
GHK equation
CHAPTER FOURAction potential
Excitable cell characterization:
- excitability
- conduction
Action potential
Stimulus
Strength
Duration
Threshold potential
Excitation
Strength- duration curve
Action potential
Voltage-gated ion channel
Voltage-gated ion channel
Pore- forming
Ion channels are ion selective
The fast Na channels ( and the slow Ca channels) have a double gating mechanism:
K channel gating
Action potential
CHAPETR FOUR
SYNAPSES
Electrical synapses
Chemical synapses:
- EPSP
- IPSP
- IP
Chemical synapse
Summation of synaptic inputs
Any questions?