Accepted at 11:10 a.m. Sep, 13, 2023 by Cameron
Author: cmahlen
Related Note: 1470880181246
Rationale for change

Potassium is the main determinant of membrane potential at rest in neurons.

Also there's an untagged UW question describing how permeability to ions drives the phases of the action potential (potassium at rest, sodium during the AP, and chloride at the end). This is the only relevant card for that question.
Source: UWorld - Step 1 2007

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Extra
Na+ makes a small contribution as well by raising the membrane potential slightly
Lecture Notes
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Missed Questions
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Pathoma
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Boards and Beyond
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First Aid
Sketchy



Watch Resting Membrane Potential


Watch Blood-Brain Barrier & CSF
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Sketchy Extra
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Picmonic
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Pixorize
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Physeo
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Bootcamp
Watch associated Bootcamp video - Cardiac Conductive Physiology: Non-Pacemaker Action Potential

Watch associated Bootcamp video - Conduction Physiology: Resting and Equilibrium Potentials
OME

Additional Resources
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One by one
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#AK_Step1_v12::#SketchyPhysiology::01_Cellular_Physiology::01_Diffusion_Potential_Resting_Membrane_Potential_&_Action_Potential::01_Resting_Membrane_Potentials !AK_UpdateTags::Step1decks::Zanki-Step-Decks::Zanki-Cardiovascular::Cardio-Physiology+Embryo,Anatomy #AK_Step1_v12::#Physeo::03_Physiology::02_Cardio::04_Electrophysiology_-_Part_1 #AK_Step1_v12::#Bootcamp::Cardiology::12_Cardiac_Conductive_Physiology::03_Non-Pacemaker_Action_Potential #AK_Step1_v12::#FirstAid::07_Cardiovascular::03_Physiology::11_Myocardial_Action_Potential::Action_Potential #AK_Step1_v12::^Other::^HighYield::2-RelativelyHighYield #AK_Step1_v12::#UWorld::Step::1382 #AK_Step1_v12::#Physeo::03_Physiology::01_General_Principles::05_Action_Potentials #AK_Step1_v12::#Costanzo::Cardio::2-Electrophysiology #AK_Step1_v12::^Systems::Cardio::Physiology #AK_Step1_v12::#Bootcamp::Neurology::11_Conduction_Physiology::03_Action_Potential #AK_Step1_v12::#FirstAid::07_Cardiovascular::03_Physiology::11_Myocardial_Action_Potential #AK_Step1_v12::#B&B::05_Cardio::04_Arrhythmias::01_Cardiac_Action_Potentials #AK_Step1_v12::#AMBOSS::llavCk #AK_Step1_v12::#OME::02_The_Cell::01_Cell_Physio::06_Excitable_Cells_Passive_Properties #AK_Step1_v12::#OME::PreClinical::02_The_Cell::01_Cell_Physio::06_Excitable_Cells_Passive_Properties #AK_Step1_v12::#Bootcamp::Neurology::11_Conduction_Physiology::02_Resting_and_Equilibrium_Potentials #AK_Step1_v12::#B&B::15_Neuro::01_Intro::01_Cells_of_the_Nervous_System #AK_Step2_v12::#SketchyIM::06_Electrolytes_&_Acid_Base::04_Retired_Lessons::03_Hyperkalemia_Ddx_&_Management_[OLD_VERSION] #AK_Original_Decks::Step_1::Zanki_Step_Decks::Zanki_Cardiovascular::Cardio_Physiology_+_Embryo,_Anatomy #AK_Step1_v12::#UWorld::COMLEX::25116 #AK_Step1_v12::#SketchyPhysiology::09_Neurophysiology::01_Blood-Brain_Barrier_&_Cerebrospinal_Fluid::01_Blood-Brain_Barrier_&_CSF #AK_Step1_v12::#UWorld::COMLEX::24493 #AK_Step1_v12::#UWorld::Step::2007