Membrane Mechanism of transport charge and non charge

Membrane. Mechanism of transport charge and non charge partial throw membrane structure of cell.

Transfer of water soluble molecules across cell membranes by transport proteins

Two classes of membran proteins

Comparison of passive and active transport

Examples of sbubstances transported across cell membranes by carrier proteins

Bacteriorhodopsin: A carrier protein

Conformational change in protein to passively carry glucose

Two components of an electrochemical gradient

Three ways of driving active transport

Three types of transport by carrier proteins

Two types of glucose carriers for transfer of glucose across the gut lining

The Na-K pump

The Na-K pump cycle

Osmosis

Avoiding osmotic swelling

Carrier mediated solute transport in animal and plant cells

The structure of an ion channel

Patch-clamp recording

Current through a single ion channel

Gated ion channels

Stress activated ion channels allow us to hear

Distribution of ions gives rise to membrane potential

K+ is responsible for generating a membrane potential Nernst equation: V = 62 log 10(Co/Ci)

Neurons

Action Potenetial

Three conformations of the voltage gated Na channel ----- +++++

Ion Flows and the Action Potential

The propogation of an action potential along an axon

The Action Potential

Synapses

Synapses

Synapses

Excitatory vs. Inhibitory Synapse

Synapses

Ion Channels