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On the axon hillock, there is a concentration of sodium channels whose role are to initiate the depolarization and signal transmission allong the axon. Once the all or none threshold is reached, depolarization occurs in a cascade unidirectional along the length of the axon, with potassium channels open just following the sodium-channel mediated depolarization, such that there is no back-propagation of the signal.
What else can I help you with?
Why is the myelin sheath so important to the nervous system?
Myelin is a fatty substance that insulates and protects nerve cells and allows them to transmit electrical signals quickly.
How is an impulse prevented from traveling the wrong way down an axon?
The presence of a refractory period caused by the locking of Na channel in the closed position. The happens just after the Na has passed through it and is not influenced by the voltage. This means that that section of the cell cant be depolarised again for a while and so the AP cant go backwardes.
Nerve Pain Can Be False?
If you are experiencing nerve pain, you need to know that not all pain that is caused in this way relates to a real, physical injury that you have sustained. There might not be anything at all wrong with your body. There could, instead, be something wrong with the nerves. They take the impulses to your brain that make you feel the pain in the first place. A lot of people spend a long time trying to figure out what is wrong with them and why they keep feeling pain when there is really nothing physically wrong with their bodies.
What is wrong with William perrys health?
he has a chronic nerve disease. he has a chronic nerve disease. he has a chronic nerve disease.
Is there nervous tissue in the respiratory system?
Neural impulses cause diaphragm and chest cage to move down wards and outwards respectively so that air can move into lungs Cough reflex is mediated by nerve impulses/reflexes
Can sleeping wrong cause a pinched nerve?
It's possible, but usually you interfere with circulation which eventually disrupts nerve flow. Hint, recovery from a pinched nerve takes months.
How is Kleptomania prevented?
Get help! or when you have the urge just think it Iver to ursekf! u knoe its wrong!
Which of the following are the main receptive or input regions found in neurons?
neurofibrils neurofibrils Both are Wrong, but I do not the correct answer. I think it's NISSL CELL The Dendrites provide the receptive surface for communications. (In some types of neurons the cell body provides such surface) Neither neurofibrils or Nissl cell is wrong. The correct answer is the dendrites. Dendrites are the structures on the neruons that are the main receptive surfaces for nerve impulses.
How do phytoplankton tell which way they are traveling?
I could be wrong, but I don't think they can.
Does your face instantly paralyze if you hit a wrong nerve in your ear when piercing cartaledge?
No.
How can World War I be prevented?
Ww1 could have been prevented if it wasnt for an assasin who killed the Hungarian archduke and the huns to invade Serbia. Hope this helps some facts could be wrong
What can go wrong if your nerve cells are not working?
Remember that there are nerve cells in the brain as well as the rest of the body. If they don't work, death will be the end result.
