6. If the action potentials shown in the diagram below occur sequentially and in close temporalproximity, what will be the final result in cell D? In this notation,< indicates an excitatoryan inhibitory synapse. Focus on overall effects – excitation andinhibition – don't worry about quantifying responses here. (Hint: you may want to identify what ishappening at each cell and then how that will be affected by the activation of the previous cell)synapse and indicatesAboveAbovethresholdstimulationAbovethresholdstimulationthresholdstimulationD

Threshold of Stimulation can be defined as the physiology of nerve and muscle cells, the minimum…

Answered: 6. If the action potentials shown in…

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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What property is responsible for the smaller steady state DVm in the postsynaptic cell compared to that in the presynaptic cell? A: Membrane capacitanceB: Membrane resistance explain your answer
You are obtaining extracellular recordings from the latetal axons of the earth worm. The distance from the stimulating cathode to the first recording electrode is 60mm and 85mm to the second recording electrode. The time from stimulation to arrival of the action potential at the first recording electrode is 5msec and to the second recording electrode is 10msec. The conduction velocity of this axon would be meters per second. 05 0.2 Ⓒ10 3
1. Shown below are figures of the closed and open structures of the voltage gated potassium channel protein in the cell membrane of a neuronal cell. Extracellular CLOSED Extracellular OPEN Cytosol Region A Cytosol Region A Region A of the channel protein functions as a paddle. The paddles move up and down, opening and closing the central pore through which potassium ions flow. The resting membrane potential of a neuronal cell is -70mV. Action potential +40 The action potential graph is shown on the right, at what point in the graph or when would voltage gated potassium channels be closed and when would they be open? Choose from Resting, depolarization, repolarization or refractory period. Describe briefly. a. Threshold -55 Failed initiations Resting state -70 Stimulus 1 Refractory period b. Would potassium ions move in or out of the cell when the voltage gated potassium channels are open? 1 4. Time (ms) What kind/type of amino acids would be present in region A of the voltage gated…
You find a neuron whose resting potential is -90mV. Which of the following are likely to be true? (select all that apply) Voltage-gated sodium channels are closed The neuron is fully permeable to sodium The neuron is permeable to potassium The neuron is hyperpolarized
- Which of the following describes the concentration of K+ and Na+ ions in and around a resting neuron?1- K+ and Na+ ion concentrations are both higher outside of the cell.2- K+ ion concentration is higher inside of the cell, Na+ ion concentration is higher outside of the cell.3- K+ ion concentration is higher outside of the cell, Na+ ion concentration is higher inside of the cell.4- K+ and Na+ ion concentrations are similar inside of and outside of the cell. - An action potential:1- is a large change in polarization.2- is an "all-or-nothing" response.3- will travel down the length of the axon4- all of the above - What prevents action potentials from traveling away from synaptic terminals?1- Inactivation of Na+ channels behind the zone of depolarization.2- Inactivation of K+ channels behind the zone of depolarization.3- An increased in graded potential along the length of the axon.4- All of the above - Which brain region is incorrectly paired with one of its functions?1- midbrain -…
Plz answer correctly ASAP
Conditions: [Na+] outside = .3 mM [Na+] inside the presynaptic cell = .01 mM [dopamine] inside = .5 mM [dopamine] outside = .001 mM ΔGinward = RT ln [X] inside/[X] outside + z F Vm F = 23,000 cal/mol V R = 1.987 cal/ mol K Membrane potential is .07 V Temperature is 273 K Using the information above and image please answer these questions : Is the concentration of sodium higher on the outside or the inside of the presynaptic cell? Would the movement of sodium be active or passive moving OUT of the presynaptic cell? SHOW your work.
If a neuron is stimulated simultaneously by 2 stimuli at its dendrites (one generates a very large hyperpolarizing potential and the other generates a very small depolarizing potential). What would happen to this neuron? Group of answer choices The summation of these two graded potentials will generate an action potential and this action potential will travel down the axon. Summation of these two graded potentials will cause the membrane potential at the axon hillock to be more negative. These graded potentials will bring the resting membrane potential to 0 mV. These graded potentials with opposite polarity would therefore generate two action potentials and they will travel along this neuron in opposite direction.
1.A poison causes a drastic rise inE value with stimulation of the membrane.Thereafter membrane is slow to return towards resting membrane potential and levels off several millivolts above the threshold potential. This poison has likely affect which feature of the membrane? a) voltage gated na+ channels. b) voltage gated K+ channels. c) Na+/K+ Atp pump 2. All cell membrane demonstrate action potential if stimulated enough? True/False. 3. how many peaks are there in a compound action potential? a)2. b)4 c)6 d)8 4. Increasing the ionic concentration in the salt bridge results in E value increase to a point after which it plateeus. This is evidence brownian movement at work in the ionic solution that is keeping from energy flowing through the bridge with the fidelity that is seen in the metal bridge? True/ False 5. All cell membrane demonstrate action potential if stimulated enough? True or False.
1. Why does the action potential not go back to where it came from? (Multiple answers possibly) the absolute refractory period prevents this from happening Sodium voltage gated ions in the area where the action potential just came from are fully activated or inactivated Sodium voltage gated ions bind to the Na+ ions, preventing them from diffusing backwards Na+ only diffuses forward in the axon 2. When neurotransmitter binds to _______________ at the dendrites, it results in a _____________ potential Ligand gated ion channels | action Voltage gated ion channels | action Voltage gated ion channels | graded Ligand gated ion channels | graded
3.) Signals are passed from axon to axon when neurotransmitter molecules are released from the presynaptic axon and diffuses across a small distance, called the synaptic cleft, to reach the post synaptic axon. If the neurotransmitter released by the presynaptic axon is dopamine and the diffusion distance across the synaptic cleft is 20 nm then how long will it take to pass the signal? The viscosity of the interstitial fluid in the synapse is 0.012 Pa*s. (You must look up dopamine properties to solve) Synapse Suiknce Facts aut Synaptic vesicle Voltage-gated Ca? /channel Presynaptic neuron Neurotransmitter molecules Synaptic cleft lon channel receptor Postsynaptic- neuron

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