fbpx

πŸ›΄ Nerve impulses and the motor neurone

Let’s delve into the basics of nervous transmission by looking at a motor neurone. Here is the structure of a myelinated motor neurone:

 

 

Labelled β€œinsulating sheath”, the myelin sheath is responsible for protecting the electrical impulses that run across the neurone.

 

But first, what happens in a resting state where no impulses are being sent?

 

This is the resting potential where the membrane permeability differentiates between sodium (Na+) and potassium (K+) ions so that at any given time there are more Na+ ions outside than inside and more K+ ions inside than…

πŸ† Read 500+ topics for all 6 UK exam boards πŸ†

πŸ“ Enter now to claim your FREE 3-day trial and find answers to all your revision topicsΒ πŸ“

βœ”οΈ Just Β£3.49/month after that. Cancel anytimeΒ βœ”οΈ

You explain everything so simply!Β πŸ™‚Β -SecretDuck on The Student Room