During an Action Potential.52.SecciónNa* flows out of the cell53.Na' activation gates and inactivationgates are both open54.Na* flows into the cel55.Calcium flows out of the cell56.K* gates are open57.Na* activation gates are closed58.Na* inactivation gates are closed59.K* flows into the cellK* gates are closedNa* activation gates and inactivation60.61.gates are both closed62.K* flows out of the cellSalto de columnaA. DepolarizationB. RepolarizationC. BOTH depolarization and repolarizationD. Neither depolarization or repolarization

At the point when a neuron is depolarized, it is bound to fire an activity potential, movement of a…

Answered: During an Action Potential.. 52.…

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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How do potassium ions travel as they move into the cell?A.Up the concentration gradient and up the membrane potentialB.Down the concentration gradient and up the membrane potentialC.Up the concentration gradient and down the membrane potentialD.Down the concentration gradient and down the membrane potential Ans: C
Which of the following are mechanisms of gustation transduction? Select one or more: a. Hydrogen atoms activate proton channels b. Sodium ions activate sodium channels and a graded potential is produced c. Entry of sodium and calcium causes the cell to depolarize and voltage-gated calcium channels to open d. Calcium ions activate calcium channels and a graded potential is produced
What causes Hyperpolarization following the spike of the action potential? Voltage-gated K+ channels close slowly allowing K+ ions to leave the cell The opening of leaky Na+ channels The Na+/K+ pump briefly reverses the direction of ion flow Both Na+ channels and K+ channels become inactivated Na+ and Cl- enter the cell until the Na+/Cl- pump closes
At rest, all gated Na+ and K+ channels are closed.Local currents __________ the axon, and voltage-gated Na+ channels __________, allowing Na+ ions to enter the cell. As the depolarization reaches threshold, this behavior becomes self-generating (as more Na+ rushes into the cell, the current causes more/neighboring voltage gated Na+ ion channels to open… positive feedback).
An intravenous injection of potassium can cause death within a minute. From what you have learned about the resting membrane potential and action potential in chapter 7, how do you think it interferes with cellular function to cause death so fast?
8. Use diagram 136 to answer the next question. If the axon of the neuron X is stimulated at threshold level Fig 136 Dendrite Axon Neuron Neuron Neuron 个 Symapse Synapse メ a. Neuron W will also be stimulated b. Neurons W and Y will both be stimulated c. Acetylcholine will move across synapse 2 d. Acetylcholine will move across synapse 1 and 2
The diagram below indicates different ion concentrations from the inside to the outside of a neuron while the neuron is at rest. A. Use the different colour to indicate the sodium ions, potassium ions, sodium ion channels, and potassium ion channels. B. Also indicate the charge inside and outside the neuron. Your answer NUNUNU extracellular fluid cytoplasm
The input region lacks _________________, but contains _____________________, Group of answer choices A. Ligand-gated channels, voltage gated channels B. K+ leak channels, voltage gated channels C. Voltage-gated channels, ligand gated channels D. Ligand-gated channels, K+ leak channels
At rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of potassium inside the cell. The sodium-potassium ion pump is used to maintain the neuron in the resting state. Which of the following statements is true? A. Remaining at rest requires the use of ATP. B. Remaining at rest requires an input of sodium. C. Remaining at rest requires the activation of cotransporters. D Remaining at rest requires decreased permeability of the membrane.
During an Action Potential….. _____ Na+ flows out of the cell _____ Na+ activation gates and inactivation gates are both open _____ Na+ flows into the cell _____ Calcium flows out of the cell _____ K + gates are open _____ Na+ activation gates are closed _____ Na+ inactivation gates are closed _____ K+ flows into the cell _____ K + gates are closed _____ Na+ activation gates and inactivation gates are both closed _____ K + flows out of the cell
A neuron may receive signals from thousands of synaptic terminals. What determines whether the receiving neuron will respond by transmitting a signal? a. the concentration of transmitter inside the receiving neuron b. the summation of excitatory and inhibitory signals received c. the number of glial cells contact the receiving neuron
B A C Match the action potential phase in the plot below with the correct image below showing the Na+/K+ ATPase and voltage-gated K+ and Na+ channels. +50- D -50- -70- 0 E A B M D + OUT -IN [Choose ] [Choose] [Choose] SHE - OUT IN + OUT IN

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