Anatomy and Physiology
Category: Science > Biology
Asked by: jgandg-ga
List Price: $8.00
02 Nov 2006 08:09 PST
Expires: 02 Dec 2006 08:09 PST
Question ID: 779414
Comment on the role of the sodium-potassium pump in maintaining a cell?s resting membrane potential. (minimum 3 sentences)
Re: Anatomy and Physiology
Answered By: tutuzdad-ga on 02 Nov 2006 09:34 PST
Dear jgandg-ga; Thank you for allowing me to answer your interesting question. Here?s a little background on the ?resting? state: ?When a neurone is not sending a signal, it is at ?rest?. The membrane is responsible for the different events that occur in a neurone. All animal cell membranes contain a protein pump called the sodium-potassium pump (Na+K+ATPase). This uses the energy from ATP splitting to simultaneously pump 3 sodium ions out of the cell and 2 potassium ions in.? Here?s the simplest explanation I could find (and with some fantastic animated diagrams to help make the point, I might add): ?Three sodium ions from inside the cell first bind to the transport protein. Then a phosphate group is transferred from ATP to the transport protein causing it to change shape and release the sodium ions outside the cell. Two potassium ions from outside the cell then bind to the transport protein and as the phospate is removed, the protein assumes its original shape and releases the potassium ions inside the cell.? NERVE IMPULSES http://www.biologymad.com/NervousSystem/nerveimpulses.htm This resumption of its original shape and the release of the potassium ions inside the cell is what is referred to as the ?resting? state. I hope you find that my answer exceeds your expectations. If you have any questions about my research please post a clarification request prior to rating the answer. Otherwise I welcome your rating and your final comments and I look forward to working with you again in the near future. Thank you for bringing your question to us. Best regards; Tutuzdad-ga ? Google Answers Researcher INFORMATION SOURCES SEARCH STRATEGY SEARCH ENGINE USED: Google ://www.google.com SEARCH TERMS USED: SODIUM-POTASSIUM PUMP CELL RESTING MEMBRANE
rated this answer:
Very helpful, reliable sources used.
|There are no comments at this time.|
If you feel that you have found inappropriate content, please let us know by emailing us at email@example.com with the question ID listed above. Thank you.
|Search Google Answers for|