Image:AP propagation membrane model view.jpg

From Wikipedia, the free encyclopedia

Image
File history
File links

Size of this preview: 764 × 599 pixels
Full resolution‎ (1,225 × 961 pixels, file size: 273 KB, MIME type: image/jpeg)

This image was uploaded in the JPEG format even though it consists of non-photographic data. The information it contains could be stored more efficiently or more accurately in the PNG format or SVG format.
If possible, please upload a PNG or SVG version of this image, derived from a non-JPEG source so that it doesn't contain any compression artifacts (or with existing artifacts removed) and with transparency where appropriate. After doing so, please replace all instances of the JPEG version throughout Wikipedia (noted under the "File links" header), tag the JPEG version with {{obsolete|NewImage.ext}}, and remove this tag. For more information, see Wikipedia:Preparing images for upload.

A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to adjacent membrane, depolarizing it as well (T2). Sodium channels then open in this adjacent membrane, and the depolarization spreads further down the membrane (T4). Meanwhile, delayed rectifyer potassium current flows in the original membrane patch, causing the falling phase of the AP. T3 is not shown but can be imagined by interpolation. Note that in T4, depolarization spreads in both directions down the membrane (i.e. also toward the place where the AP originated. A second action potential is not fired in that membrane because it is refractory, thus allowing for one-way AP conduction.

Diagram drawn by me in Corel Draw!

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 and no other versions published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. Subject to disclaimers.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	23:03, 12 July 2005	1,225×961 (273 KB)	Synaptidude (Talk \| contribs)	(A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to ad)
	23:00, 12 July 2005	1,225×961 (274 KB)	Synaptidude (Talk \| contribs)	(A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to ad)
	16:53, 6 July 2005	1,225×961 (271 KB)	Synaptidude (Talk \| contribs)	(A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to ad)
	16:47, 6 July 2005	1,225×961 (277 KB)	Synaptidude (Talk \| contribs)	(A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to )
	16:45, 6 July 2005	2,401×2,485 (367 KB)	Synaptidude (Talk \| contribs)	(A diagram in three parts showing how an action potential propagates down a membrane, using the electrical membrane model as a guide. A local depolarization opens local sodium channels. Sodium current causes membrane depolarization (T1) which spreads to )