Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
Use diagrams to explain the mechanism of how a nerve impulse is initiated and propagated in a myelinated neurone. Include the following terms; threshold stimulation. Ion pump, local circuit, salutatory conduction, and refractory period.
Member rating: No Rating | Words: | Submitted: Sun Dec 15 2002
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
1.3 use diagrams to explain the mechanism of how a nerve impulse is initiated and propagated in a myelinated neurone. Include the following terms; threshold stimulation. Ion pump, local circuit, salutatory conduction, and refractory period. The plasma membrane of neurons, like all other cells, has an unequal distribution of ions and electrical charges between the two sides of the membrane. The outside of the membrane has a positive charge, inside has a negative charge. This charge difference is a resting potential and is measured in millivolts. Passage of ions across the cell membrane passes the electrical charge along the cell. The voltage potential is -65mV (millivolts) of a cell at rest (resting potential). Resting potential results from differences between sodium and potassium positively charged ions and negatively charged ions in the cytoplasm. Sodium ions are more concentrated outside the membrane, while potassium ions are more concentrated inside the membrane. This imbalance...
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 147,038 others
Receive email updates for this category
- Simply tell us your email address and receive a weekly Study Help Email for FREE
- Receive 3 FREE essay views with each email
- Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk
