How an action potential moves down the axon by Mumina Begum https://padlet.com/mzb2/bjn6fw1b2qcsc455 Tell me starting from resting potential, what happens during and after an action potential en-us 2022-11-17 11:59:43 UTC 2026-03-09 19:40:27 UTC hello@padlet.com Image https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389603617 2022-11-18 08:39:34 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389603617 https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389603946 the resting potential is the potential difference across the neuron membrane while the neurone is at rest]]> 2022-11-18 08:39:56 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389603946 Resting potential https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389604528

The resting potential is the potential difference across the neurone is at rest. It is usually around -70mV to -60mV. It is maintained via the sodium potassium pump. Which pumps 3 Na+ ions in and 2 K+ ions.


]]> 2022-11-18 08:40:31 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389604528 Depolarization https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389605708 That's when the sodium voltage gated channel is open and the sodium ions diffuse into the neurone causing the overall charge to become +40mV.]]> 2022-11-18 08:41:57 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389605708 Resting potential l63327 https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607014 The resting potential is -70mv inside the cell because 3Na+ ions are pumped out of the neurone for every 2 k+ ions pumped in. ]]> 2022-11-18 08:43:28 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607014 https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607429 Resting potential is the voltage difference across the neurone membrane while the neurone is at rest. It is about between -70 - 60. The neurone is more negative inside than the outside. Three sodium ions pumped out of the outside. Sodium channels are closed so ions cannot move out of the neurone.]]> 2022-11-18 08:43:57 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607429 https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607744 2022-11-18 08:44:16 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607744 Resting potential https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607789 Dear Nana Kumi Darius III,

Neurone cell membranes are polarised, the resting potential is the potential difference across the neurone membrane while the neurone is at rest, the voltage of this is about -70mv to -60mv from inside to the outside. A neurone is more negative inside than outside. 3 na move out, 2k move in. Sodium and potassium channels are closed so ions cannot get back in or out of the neurone once pumped 


]]> 2022-11-18 08:44:19 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389607789 Resting potential https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608413 The sodium-potassium pump restores resting potential by pumping Na+ ions back out the neurone and K+ ions back in ]]> 2022-11-18 08:45:01 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608413 Depolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608514  depolarisation of the neuron membrane so that the inside is more positive than the outside.
It’s is between +30 -+40mv inside the neuron compared to the outside. 
The voltage gated Sodium Chanel opens in response to a stimuli 
Sodium ions diffuse into the neuron down the concentration gradient this starts a nerve impulse. 
The threshold for this to begin is -55mv and from here. 
The all or nothing law applies ]]> 2022-11-18 08:45:08 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608514 Repolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608569 After an action potential has been created, sodium channels close while Potassium channels open. K ions diffuse out of the neurone down the concentration gradient created sodium-potassium pump. The neurone repolarises - the inside of the neurone becomes negative co the outside once again. Potassium channels are slow to close, so too many K ions diffuse out of it and the potential difference overshoots slightly. The sodium-potassium pumps restore resting potential by pumping]]> 2022-11-18 08:45:12 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608569 Repolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608680 At 30mv sodium voltage gated channels close and potassium voltage gated channels open. Potassium ions diffuse out the neurone down the concentration gradient. The neurone repolarises where the inside of the neurone become negative compared to the outside]]> 2022-11-18 08:45:20 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389608680 Repolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389609140 Repolarisation occurs when an action potential has been created (+30 or +40 mV). The sodium voltage gated channels close and the potassium voltage gated channels open. The potassium ions diffuse out of the neurone, down the concentration gradient causing it to repolarise.]]> 2022-11-18 08:45:51 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389609140 Repolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389609992 - Sodium channels close
- Potassium channels open
- Potassium diffuses out of neurone
- Neurone repolarises 
- Potassium channels are too slow to close therefore too many potassium ions diffuse out of the neurone. This causes hyperpolarisation.]]> 2022-11-18 08:46:45 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389609992 Depolarisation dstbbn8mxx https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389610581 Depolarisation is when the inside is more positive than the outside. The inside of the neurone is +40mV  compared to the outside. It occurs when the sodium channels open in response to a stimulus. Voltage gated sodium channels open so they diffuse into the neurone down the concentration gradient causing it to depolarise. Voltage gated potassium ions are closed. ]]> 2022-11-18 08:47:20 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389610581 Repollaraysation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389610993 Potassium channels OPEN, while Sodium channels CLOSE

In the Sodium-Potassium Pump- K+ ions diffuse out of the neurone down a concentration gradient. 

In the end, the neurone repolarises since the inside of the neurone becomes more negative contrasting to the outside.]]> 2022-11-18 08:47:43 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389610993 Repolarisation https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389611018 Repolarisation is happens when the action potential is created, this is when sodium gated channel closes and potassium gated channel opens. Potassium diffuses out of the neurone. Potassium channel are slow to close causing more potassium to diffuse making it hyperpolarised


]]> 2022-11-18 08:47:44 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389611018 The resting potential are maintained by the sodium and potassium pump also sodium channels and potassium channels.They active transport 3 Na+ ions out of 5he neurons and 2 K+ 8 ions in by using ATP and work against concentration gradient. When The sodium and potassium channels opens they allow facilitated diffusion of either Na+ or K+ ions in or out of the neurons. https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389613281 2022-11-18 08:50:13 UTC https://padlet.com/mzb2/bjn6fw1b2qcsc455/wish/2389613281