Which of the following statements about A-type K+ channels are true? They include Kv4 and Kv1.4 subtypes They enable frequency coding in many neurons They are expressed in dendrites They are high-voltage activated All of these are true
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A: Answer : A) Propagate long distances through neural structures, without attenuation in their…
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A: Introduction: The action potential is the name given to the brief series of events that occur in the…
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A: Thank you for the question Answer : If a second action potential can be generated it refers to as…
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A: Neurotransmitters are chemical messengers that help to transmit neural signals from one neuron to…
Q: An action potential is shown below. Number 4 on the graph is showing which phase? 3 Membrane…
A: Action potential is a brief reversal of membrane potential where the membrane potential changes from…
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A: 1. False 2. True 3. False 4. True 5. False 6. True 7. False 8. True
Q: Which of the following statements is not correct? +30! -F Membrane Potential (mV) H D. .B -70- A C…
A: The picture is showing the action potential curve. The action potential is generated on receiving…
Q: the normal extracellular Na+ concentration is 140 mM and you replace Na+ such that the extracellular…
A: Given The extracellular sodium is changed from 140mM to 14mM
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A: Bipolar cells are the neurons that basically connect the outer portion of retina to the inner…
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A: The action potential is a potential that is fired when the voltage-gated sodium ion channels open.…
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A: The synapse or “gap” is the place where information is transmitted from one neuron to another.…
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A: B-Smooth muscle relaxation cGMP is a typical controller of particle channel conductance,…
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A: The cell membrane is a biological barrier that divides the inside of all cells from their…
Q: Which of the following occurs first when voltage reaches the threshold level in a neuron plasma…
A: Ans: The potential is generated in the neuron or plasma membrane due to difference in sodium and…
Q: Depolarization is: ) Is the 2nd step of an action potential O Is the last step of an action…
A: Depolarization is defined as a transition in a cell that occurs when the cell's electric charge…
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A: First let us understand the term Postsynaptic Potential. When a nerve impulse is transmitted…
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Q: In SA nodal cells the upstroke of the action potential: A)is characterized by a substantial…
A: The sino atrial node is the pacemaker of the heart. The cells of the sea node have a particular…
Q: What would happen to the resting membrane potential of a neuron if sodium (Na+ ) channels were…
A: Introduction:- Because Na + is normally present at a much higher concentration outside of a cell…
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A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…
Q: Select the correct term or phrase from the drop- down for each blank to complete the correct…
A: Generation of now impulse in naap fibres depends on distribution of sodium and potassium in and out…
Q: When an action potential happens: OA Sodium rushes into the cell in the first stage creating…
A: A nerve cell is a specialized cell for the communication to transmit information between neuron…
Q: Depolarization is: O Is the last step of an action potential O A reduction in the electrochemical…
A: The action potential is the short-term change in the electric potential on the cell’s surface in…
Q: In this phase, ALL voltage-gated Na+ channels are in the process of re-setting and cannot be opened…
A: An abrupt, quick, temporary, and spreading shift in the resting membrane potential is classified as…
Q: IPSP differs from EPSP in :-a- being of shorter durationb- being unable o summate spatiallyc- moving…
A: Signal conducted at the synaptic terminal of neuron (presynaptic neuron) connected to the dendrites…
Q: Which of the following is FALSE about action potentials? At resting potential, there are more…
A: Change in the membrane potential are brought about by changes in ion movement across the membrane.…
Q: Which statement is true regarding chemical neurotransmission? O An IPSP closer to the soma will…
A: The cells of the nervous system have a significant functionality i.e. Communication. At the neuronal…
Q: Axon can't branch Afferent neurons are generally bipolar neurons Most neurotransmitters are…
A: The structural and functional unit of the nervous system is the neuron. These nerve cells are not…
Q: Which of the following is mediated by a2d subunits of Ca++ channels? Dehydration of Ca++ Creating…
A: Voltage-gated calcium (CaV) channels are needed for various key functions. This includes transmitter…
Q: Blocking KCa2 (SK) channels will typically ________ a neuron's firing rate Increase…
A: SK (KCa2) channels are the calcium activated potassium channels. In other words SK channels can be…
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A: The the rod and cone cells in the retina are responsible for sensing the dim and colour vision…
Q: Which of the following is not a low voltage-activated Ca++ channel? (select all that apply) Cav2.3…
A: Cav3 is one of the major protein families of voltage gated calcium channels, (others being Cav1 and…
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A: Nervous system is defined as the complex network of nerves and nerve cells that play a major role in…
Q: Which of the following statements about hyperpolarization are correct? Pick all that apply to what…
A: Hyperpolarisation is an event that occurs in neurons during the action potential.
Q: The resting voltage of the cell membrane: O is a property of the cell O is generated by…
A: Cell membrane It refers to the biological membrane that is involved in the separation of the inside…
Q: hyperpolarization repolarization…
A: Correct answer for the above questions is:- 1) C. 2) A. 3) B.
Q: Many neurotransmitters trigger depolarisation by binding their receptors and gating an ion channel…
A: Answer: Neurons are like electrical devices, having many channels sitting in the cell membrane(the…
Q: Answer the following question concerning the diagram of the action potential below. (3 2 1) Time…
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Q: Action potentials in heart muscle cells have a prolonged plateau phase caused by ______through…
A: The heart muscle cells has 5 phases in their cardiac action potential ; namely phase 0 , 1 , 2 , 3 ,…
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A: Pumps are transmembrane proteins that actively move ions or solutes against a concentration or…
Q: The membrane voltage at the axon hillock is not affected by_ O a. EPSPS b. temporal summation OC.…
A: Hello. Since you have asked multiple questions. We will be able to answer only the first one. for…
Q: Which of the following phases of an action potential is correctly matched with the changes in ion…
A:
Q: Local potentials are produced by ligand-gated channels True False
A: Ligand-gated ion channels (LGICs) are basic membrane proteins that contain a pore which permits the…
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- How long does all the signaling through the sensorypathway, within the central nervous system, and throughthe motor command pathway take?a. 1 to 2 minutesb. 1 to 2 secondsc. fraction of a secondd. varies with graded potentialdendrotoxins, produced by the mamba snakes are inhibitors of the voltage gated k+ channel. what phase of the action potential with this toxin effect? how would it affect ion permeability during this phase howard ion movement be affected?IPSP differs from EPSP in :-a- being of shorter durationb- being unable o summate spatiallyc- moving the membrane potential away from thresholdd- depending upon opening of voltage K + channels
- In SA nodal cells the upstroke of the action potential:A)is characterized by a substantial overshoot component.B)results from rapid inward movement of Na+.C)results from inward movement of Ca2+D)results from inward movement of K+.Describe the distribution of voltage gated ion channels in the nodes of Ranvier-vs-trigger zone/axonThe ___________________ provides electrical insulation that allows faster propagation of nerve impulses. regarding signal transduction mechaniscm in neurons.
- Epilepsy is the disesae. Which areas of the brain are affected by epilpesy? What type of neurotransmitters are altered in this epilepsy? Provide neurophysiological evidence. Please talk about voltage gated K+, Na+, Ca++ and ligand channels. Tell if any of them are affected. if affected what is the consequence?Which ion channels are affected?The rattlesnake alerts enemies to its presence with a rattle—aset of modified scales at the tip of its tail. Describe the distinctroles of gated ion channels in initiating and moving a signalalong the nerve from the snake’s head to its tail and then fromthat nerve to the muscle that shakes the rattleSubject: Neurophysiology Many people thought that the inwardly rectifying K+ channel allows K to enter the cell, increasing intracellular K concentration, and thereby hyperpolarizing the cell. Of course this is absolutely incorrect! a) When the inward rectifier opens K+ does not enter cardiac myocytes. Explain why. b) When ion channels open the membrane potential DOES change. Why?
- Why are action potentials usually conducted in one direction?(A) Ions can flow along the axon in only one direction.(B) The brief refractory period prevents reopening of voltagegated Na+channels.(C) The axon hillock has a higher membrane potential thanthe terminals of the axon.(D) Voltage-gated channels for both Na+and K+open in onlyone direction.IPSP could result from :-a- opening of K + channelsb- opening of ligand-gated cation channelsc- closure of Cl- channelsd- closure of potential-gated Ca ++ channelsThe giant axon of the squid (Figure Q11–3) occu-pies a unique position in the history of our understandingof cell membrane potentials and nerve action. When anelectrode is stuck into an intact giant axon, the membranepotential registers –70 mV. When the axon, suspended in abath of seawater, is stimulated to conduct a nerve impulse,the membrane potential changes transiently from –70 mVto +40 mV.