Action Refractorypotential period506.509.5.-10.-100234Time (milliseconds)1567Action Potential in a NeuronPlace the number from the graph that matches the description in the blank below.The voltage gated sodium channels are open.The threshold level of the neuron is represented by the number:The sodium channels have closed. The potassium channels are open and potassium ions are flowing out.The potassium channels are slow to close. The membrane potential is more negative than the resting membrane potential.Membrane Potential (mV)

Neurons are cells in the body that are capable of being excited. The distribution of different ions…

Answered: Action Refractory potential period 50…

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter35: The Nervous System

Section: Chapter Questions

Problem 9RQ: After an action potential, the opening of additional____voltage-gated ____ channels and The...

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Similar questions

A drug is called an agonist if it ________. blocks a receptor interferes with neurotransmitter reuptake acts like the endogenous neurotransmitter by binding to its receptor blocks the voltage-gated calcium ion channel
Voltage-gated Na+ channels open upon leaching what state? resting potential threshold repolaiization overshoot
Graph of membrane potential versus time The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? Explain why the membrane potential changes at X. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential. Describe two things that contribute to the resting membrane potential.
Synaptic delay :-a- is the time needed for release of neurotransmitter from synaptic vesiclesb- the minimal delay time in the central nervous system is about 0.5 millisecondc- is determined by the type of the neurotransmitterd- is determined by the number of postsynaptic receptors
Question:- There are multiple potential causes for seizures. Determine which changes to protein function could potentially account for the excess neuronal signaling that leads to seizures in your patient. (Select all that apply!) A. decreased activity of voltage‑gated Ca2+ channels B. decreased sensitivity of chemically gated Cl− channels C. increased activity of voltage‑gated Na+ channels D. increased sensitivity of chemically gated K+ channels. write the answer first then explain the process and mechanism.
Depolarisation & repolarisation in metaneuron - put the following events in order (from 1 to 4). Membrane potential crosses the threshold potential and an action potential is achieved. Depolarisation occurs when the applied current is sufficient to move membrane potential towards neutral. The neuron’s membrane potential drops below the initial resting membrane potential and temporarily becomes refractory to further action potentials. Membrane quickly repolarises by opening of K+ channels, allowing K+ions to leave the cell and charge separation to be re-established.
Subject: Neurophysiology The neuron for this experiment is in a bath with [K+] = 2 mM and [Na+] = 150 mM. Calculate the Nernst Equilibrium potential for each ion. What is your estimate for the gNa and for gK? If you are more comfortable, use PNa and PK. Remember, these values should be between 0 and 1. What is the resting membrane potential for this cell? Draw an action potential for this neuron in this solution. Keep in mind that this neuron is in unusual solutions. Label each axis and indicate inward and outward currents. Be absolutely certain to label the peak voltage and threshold for the AP!
After an action potential, the opening of additional____voltage-gated ____ channels and The inactivation of sodium channels, cause the membrane to return to its resting membrane potential. sodium potassium calcium chloride
Many neurons have only a single axon, but many terminals at the end of the axon. How does this end structure of the axon support its function?
Which of the following is probably going to propagate an action potential fastest? a thin, unmyelinated axon a thin, myelinated axon a thick, unmyelinated axon a thick, myelinated axon
What ion enters a neuron causing depolarization of the cell membrane? sodium chloride potassium phosphate
Which of the following voltages would most likely be measured during the relative refractory period? +30 mV 0 mV -45 mV -80 mv

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