Choose all that apply[Na*]+[K']|+ ++ +This diagram is a drawing of normal conditions that occur in a neuron's axon (not alldetails are included). This stage that a living neuron would be in, would showthatno positive ions are inside the cellcurrent is traveling down the axonthe cell will be at rest once the Na ions enter the cellthe cell is at restNa ions are predominantly outside the cel

Neurons are the electrically excitable cells that make up the nervous system and the brain. They…

Answered: Choose all that apply [Na*] [K'] TThis…

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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structures in the following diagram of a neuron. ?do it
The giant squid axon has a diameter = 1mm and 1 = 13mm. Compared to a mammalian neuron with a diameter = 1 um and ^ = 0.2mm, which of the following is correct? graded potentials can generate action potentials in the mammalian axon but not in the squid axon. graded potential of similar magnitude would result in action potentials with larger amplitude in the mammalian axon graded potentials of similar magnitude would result in action potentials with larger amplitude in the squid axon graded potentials of similar magnitude would travel furthest from their point of origin in the mammalian axon graded potentials of similar magnitude would travel furthest from their point of origin in the squid axon
Please asap
What stage of the action potential is illustrated by the set up shown? interstitial fuid axon cytoplasm interstitial fiuid Resting potential Hyperpolarization O Depolarization Repolarization K'charnel
Place the following events in chronological order from 1-8: Nat enters the cell, and depolarization occurs to approximately +30 mV. The voltage across the cell membrane is -70 mV, the resting membrane potential. Upon reaching the peak of the action potential, the VG Nat channels are inactivated by the closing of their inactivation gate and the activation gate of each VG K channel opens. VG K channels close by the closing of their activation gate, and the resting membrane potential is gradually restored. An excitatory post-synaptic potential depolarizes the membrane to threshold and the activation gate of VG Nat channels open. Upon returning to the resting membrane potential, VG Na channels are reset by opening of the inactivation gate and the closing of the activation gate. VG K+ channels are slow to close, resulting in an excess of K* efflux and hyperpolarization. Depolarization occurs as K+ flows out of the cell.
What is the arrow identifying in the picture below? soma dendrite O action potential Oaxons axon hillock < Previous M
All of the following are true for neurons EXCEPT neurons must produce many proteins neurons are electrically excitable cells neurons have a relatively high consumption of oxygen neurons undergo mitosis
Consider the following three diagrams of a nerve cell membrane. They show resting potential, depolarization, and hyperpolarization. Figure out which one is which, then draw them in the order they occur in a cell that undergoes an action potential outside + Na* inside K* Na* Nat K Nat K Na potential: -80 mV outside + Na K* Na* inside Na+ K Nat Na* K+ potential: +30 mV outside Na Na Na Na* K+ inside K* Na* Kt potential: -70 mV
threshold resting membrane potential decrease calcium channels increase action potentials The autonomic nervous system influences the heart rate. A sympathetic signal (norepinephrine) results in opening. This accelerates the process of reaching thereby resulting in a in time between successive action potentials. A parasympathetic signal (acetylcholine) results in the dropping to -70mV. This results in an in time for cells to reach threshold, thereby increasing the time between successive
An action potential Membrane potential (mV) -40 40 -65 II -80 0 -Overshoot Rising Falling phase phase III Voltage threshold Resting potential Undershoot 1 2 3 4 Time (ms) In the figure above, which arrow best represents the point where the voltage-gated sodium channels are inactivated and locked? OI ○ III O IV ○ II
4,5,6 and 7 if possible
4. Na+ channels and Action Potential Initiation. Action potentials are often initiated at the axon hillock, where the axon leaves the cell body. The axon hillock has a high density of Na+ channels, which lowers the threshold for initiating an action potential. MetaNeuron can be used to measure the effect of Na+ channel density on the threshold of action potential generation. Vary "gNa max" from 200 to 380 mS/cm2 in 20 mS/cm2 steps. (Na+ channel density is proportional to gNa max.) For each "gNa max" value, determine the threshold stimulus amplitude (in μA) for initiating an action potential. Plot the threshold current as a function of gNa max. Why does the action potential threshold vary as Na+ channel density is changed? 5. Action Potential Membrane Conductances. Starting with the default parameter values. Select "Show ionic conductances" in the "Conductances and Currents" window. The green and blue Iraces show the time course of the Na+ and K+ conductances that are activated during…

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