Ion pump and membrane resting potential

Référence de la vidéo 11936727
Ion pump and membrane resting potential. Animation illustrating how the resting potential of a nerve cell membrane is maintained using ion pumps powered by ATP (adenosine triphosphate, lower left). The membrane (orange) is shown with an ion pump (red, left) and a potassium channel (green, right). The ion pump operates continuously, moving 3 sodium ions (red) from inside to outside the cell, and 2 potassium ions (blue) from outside to inside the cell. This results in a higher potassium ion concentration inside and a higher sodium ion concentration outside, but as the membrane in its resting state is more permeable to potassium ions than to sodium ions, the flow of potassium ions through the potassium channels (right) determines most of the resting membrane potential. This is around minus 70 millivolts (mV), close to the potassium ion equilibrium potential. For this animation without labels, see K004/2041.
Licence : Droits gérés
Crédit : Science Photo Library / Biocosmos / Francis Leroy & Michael Pierard
Model Release : Non requis
Durée : 20 Secondes
Aspect ratio : 16/9
Restrictions : -

Prix pour cette vidéo À partir de 70 €

Publicité (Communication d'entreprise etc) À partir de 70 €
Rédactionnel (Sites web multiples etc) À partir de 125 €
Médias (Émission TV, Divertissement TV etc) À partir de 150 €

Mots-clés

;