MYTUTOR SUBJECT ANSWERS

1331 views

Why do nerve impulses travel faster in myelinated neurons?

The myelin sheath is a fatty layer made up of the hugely expanded plasma membrane of schwann cells which surround the axon of neurons. The axon is unprotected where the sheath of one cell meets the next and these points are known as nodes of Ranvier. Voltage gated sodium ion channels are confined to the nodes. The influx of sodium ions at one node creates enough depolarization to reach the threshold of the next. This means that the action potential 'jumps' from one node to the next. The process is known as saltatory conduction and results in much faster propagation of the nerve impulse compared to non-myelinated neurons (where action potentials travel as one slow wave)

Hannah T. A Level Biology tutor, GCSE Maths tutor, GCSE Biology tutor

2 years ago

Answered by Hannah, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

209 SUBJECT SPECIALISTS

Ollie W. GCSE Biology tutor, IB Biology tutor, A Level Biology tutor...
£24 /hr

Oliver W.

Degree: Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Maths+ 4 more

Biology
Maths
Extended Project Qualification
Economics
Chemistry
-Personal Statements-

“I am third year student at the University of Cambridge studying Natural Sciences. I specialise in Neurobiology. However, I have a lot of experience in othersciences and maths, at GCSE and IB level. I studied for 5 years at Sevenoaks Sc...”

£20 /hr

Mihai P.

Degree: Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Chemistry
-Medical School Preparation-

“I would like to share my passion for science and help you discover the essential patterns which govern our world.”

MyTutor guarantee

£24 /hr

Xanthe W.

Degree: Biological Sciences with a Year in Industry/Research (Bachelors) - Imperial College London University

Subjects offered:Biology, Maths+ 1 more

Biology
Maths
Chemistry

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

About the author

Hannah T.

Currently unavailable: until 04/12/2015

Degree: Biology (Bachelors) - Durham University

Subjects offered:Biology, Maths

Biology
Maths

“Friendly, patient and engaging tutor, ready to help you with Biology GCSE and A-level and achieve the best grades possible! ”

You may also like...

Other A Level Biology questions

Describe the structure and function of a chemical synapse.

What bonds are present in each type of structure of a protein?

What are the light-dependent reactions of photosynthesis?

Describe how the hormone glucagon helps a healthy individual to maintain their blood glucose concentration correctly.

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok