Physiology page 1 Physiology 2 nd Faculty of
- Slides: 22
Physiology page 1 Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Content Terminology What action potential really means Where we can find it Neurones Networks of neurones Processing of information Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Action potential definition A temporary reversal in the potential difference across a plasma membrane that occurs when a cell has been activated by a stimulus. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential U=mxgxh Potential energy = potential to deliver work Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Tsunami Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology Introduction To Action Potential page 2 = 1. 5 V U = Q 1 x Q 2 / r ~ 220 V U … voltage Q 1 … charge Q 2 … charge r … distance Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Electric potential is a voltage that we measure with a voltmeter. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Electric potential is a voltage that we measure with a voltmeter. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Electric potential is a voltage that we measure with a voltmeter. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Electric current is a movement of free electrons. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Ions exert force on free electrons which move the voltmeter pointer. Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential + Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential Copyright © 2010 Ludek Nerad
Physiology Introduction To Action Potential page 2 Where can we see action potential? Neurones Pacemaker cells Neuromuscular junction Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Action potential Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Conduction in myelinated vs. non-myel. neurones 10 – 120 m/s 5 - 25 m/s Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Saltatory conduction Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 5 m Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential 18 m Copyright © 2010 Ludek Nerad
Physiology page 2 Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential Copyright © 2010 Ludek Nerad
Physiology page 2 Introduction To Action Potential Synaptic transmission Physiology, 2 nd Faculty of Medicine, Charles University Copyright © 2010 Ludek Nerad
Physiology page 2 Physiology, 2 nd Faculty of Medicine, Charles University Introduction To Action Potential Copyright © 2010 Ludek Nerad
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