Neurons and Nerves Impulses

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Presentation transcript:

Neurons and Nerves Impulses The structure of a motor neurone, sodium-potassium pumps and the resting potential.

Neuron Structure

Sodium-potassium pump Uses ATP to move Na+ and K+ ions across the axon membrane Sodium potassium pumps are found along the membrane

Resting Potential

Summary The resting potential is caused by two processes: Active transport of K+ ions into the neurone and Na+ ions out of the neurone. Facilitated diffusion of K+ ions back out of the neurone. The tissue fluid around the neurone then contains more positively charged ions than the cytoplasm inside. A 'potential difference' forms across the membrane, called the "RESTING POTENTIAL"