Results are out! Find what you need...fast. Get quick advice or join the chat
x

Unlock these great extras with your FREE membership

  • One-on-one advice about results day and Clearing
  • Free access to our personal statement wizard
  • Customise TSR to suit how you want to use it

Why are there two types of neurones (myelinated and non-myelinated)

Announcements Posted on
Find your uni forum to get talking to other applicants, existing students and your future course-mates 27-07-2015
Win top prizes in our mega results day giveaway... 24-07-2015
  1. Offline

    ReputationRep:
    Hi guys, I'm just wondering why there are two types of neurones as stated in title.... shouldn't all the neurones in the body be myelinated, seeing as myelinated neurones carry impulses at faster speeds than unmyelinated neurones..?
  2. Offline

    ReputationRep:
    Hi the ones that are not myelinated are only found in parts of the body where fast responses are needed mainly in peripheral nervous system, the non myelinated allow for quicker impulses

    Hope that helps


    This was posted from The Student Room's iPhone/iPad App
  3. Offline

    ReputationRep:
    (Original post by mrsd09)
    Hi the ones that are not myelinated are only found in parts of the body where fast responses are needed mainly in peripheral nervous system, the non myelinated allow for quicker impulses

    Hope that helps


    This was posted from The Student Room's iPhone/iPad App

    But i thought that the ones that are myelinated conduct impulses faster due to the nodes on Ranvier (saltatory conduction?)
  4. Offline

    ReputationRep:
    (Original post by mrsd09)
    Hi the ones that are not myelinated are only found in parts of the body where fast responses are needed mainly in peripheral nervous system, the non myelinated allow for quicker impulses

    Hope that helps


    This was posted from The Student Room's iPhone/iPad App
    (Original post by James A)
    But i thought that the ones that are myelinated conduct impulses faster due to the nodes on Ranvier (saltatory conduction?)
    James A is right here: myelinated neurones carry impulses quicker than non-myelinated neurones due to the Nodes of Ranvier and saltatory conduction, as the impulse 'jumps' between the Nodes of Ranvier, meaning that less of the axon membrane has to be depolarised / repolarised / hyperpolarised.
  5. Offline

    ReputationRep:
    (Original post by James A)
    Hi guys, I'm just wondering why there are two types of neurones as stated in title.... shouldn't all the neurones in the body be myelinated, seeing as myelinated neurones carry impulses at faster speeds than unmyelinated neurones..?
    just a guess, but my thoughts are that it's due to evolution... (as most things commonly are), in some areas, where immediate responses aren't necessary or the distance the impulse travels is small, then having unmyelinated neurones wouldn't be disadvantageous, hence they stuck
  6. Offline

    ReputationRep:
    this is a useful collection of videos.. keep watching next video untill the nerve ones finish (about 4/5 I think)

    http://www.khanacademy.org/science/b...my-of-a-neuron
  7. Offline

    ReputationRep:
    (Original post by thegodofgod)
    James A is right here: myelinated neurones carry impulses quicker than non-myelinated neurones due to the Nodes of Ranvier and saltatory conduction, as the impulse 'jumps' between the Nodes of Ranvier, meaning that less of the axon membrane has to be depolarised / repolarised / hyperpolarised.

    (Original post by tdx)
    this is a useful collection of videos.. keep watching next video untill the nerve ones finish (about 4/5 I think)

    http://www.khanacademy.org/science/b...my-of-a-neuron
    Cheers lads, I also realised that myelinated neurones are found in the sensory/motor neurones (because they travel long distances)

    Non-myelinated neurones on the other hand are found in the brain where only short distances have to be made...

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: June 6, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Would you consider Clearing if you missed your offer?
Results and Clearing

Results are coming...

No sweat. Here's all you need to make sure you're ready

new on tsr

What's your life ambition?

Graduating, travelling, owning a business?

x

Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.