Electrophysiology of the Neuron Phase State of lon Channels Movement of lons Voltage Across Membrane RMP Resting Membrane Potential Hyperpolarizing Graded Potential IPSP Depolarizing Graded Potential EPSP Depolarization Phase of Action Potential Peak of Action Potential Repolarization Phase of Action Potential Hyperpolarization Phase of Action Potential Return to RMP All voltage gated channels-CLOSED All chemically gated channels -CLOSED Voltage gated Na* CLOSED Voltage gated Na* OPEN Na+ and K+ leak channels - OPEN Na+ K+ pump working K+ Voltage gates close slowly Voltage gated K* CLOSED Voltage gated K* OPEN Cl- chemically gated channels- OPEN Na+ chemically gated channels -OPEN K+ chemically gated channels -OPEN 2 K+ pumped IN 3 Na+ pumped OUT K+ diffuses OUT Na* diffuses IN K+ diffuses out or Ch -70 mV to -56 mV -55mV to +30 mv -70 mv +30mv More negative than -70 mV +30mV to -70 mV

Electrophysiology of the Neuron Phase State of lon Channels Movement of lons Voltage Across Membrane RMP Resting Membrane Potential Hyperpolarizing Graded Potential IPSP Depolarizing Graded Potential EPSP Depolarization Phase of Action Potential Peak of Action Potential Repolarization Phase of Action Potential Hyperpolarization Phase of Action Potential Return to RMP All voltage gated channels-CLOSED All chemically gated channels -CLOSED Voltage gated Na* CLOSED Voltage gated Na* OPEN Na+ and K+ leak channels - OPEN Na+ K+ pump working K+ Voltage gates close slowly Voltage gated K* CLOSED Voltage gated K* OPEN Cl- chemically gated channels- OPEN Na+ chemically gated channels -OPEN K+ chemically gated channels -OPEN 2 K+ pumped IN 3 Na+ pumped OUT K+ diffuses OUT Na* diffuses IN K+ diffuses out or Ch -70 mV to -56 mV -55mV to +30 mv -70 mv +30mv More negative than -70 mV +30mV to -70 mV

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Similar questions

Drag and drop the following events of an action potential into its correct order: Voltage-gated Na* channels open and Na* floods into the neuron. Nat channels inactivate and voltage gated K* channels open. Ligand-gated Na* channels open. Voltage gated K* channels close and membrane potential approaches the resting membrane potential.
Please help me to reorder the items below to correctly label the numbers in the diagram.
During the resting state, a neuron is: polarized with sodium ions outside the cell and potassium ions inside the cell restoring the ionic conditions utilizing the sodium-potassium pump depolarizing and generating an action potential propagating the action potential repolarizing as potassium ions diffuse out of the cell
Membrane permeability at the rising phase of an action potential is dominated by: O Co-transporters Nongated Channels O K+ Voltage-gated Channels O Na+ voltage-gated Channels O Chemically-gated Channels
Describe the action potential in terms of the different functional states of the voltage- gated Na+ membrane channels (Note: there are three states)
The action potential is split into 4 parts (A-D). For each part, 1. Describe what stimulated the channel responsible for this part, 2. what is the likely ion that is moving and 3. explain which direction the ion had to move to create the measured membrane potential.
What is Membrane potential t how does it function for what? is it considered an nd action potential P
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Excitatory postsynaptic potentials (EPSP) are associated with ___ depolarization repolarization hyperpolarization resting potential
An influx of positive sodium ions eventually causes closing of the inactivation gates of voltage regulated sodium channels, stopping the influx of positive sodium ions, and thus the final stages of an action potential are regulated by _____ feedback.
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Anatomically, the motor endplate potential is characterized by synaptic boutons active zones junctional folds Ach receptor-channels all the above