excitatory and 15 inhibitory postsynaptic potentials appear simultaneously on the plasmatic membrane of motoneuron. Answer the question A and fulfill the task B: A) Will this neuron generate the efferent nervous impulses if the amplitude of single EPSP and IPSP appeared on the axonal hillock`s membrane equals 1 mV? Why? B) Name the state of this neuron and name the type of summation

excitatory and 15 inhibitory postsynaptic potentials appear simultaneously on the plasmatic membrane of motoneuron. Answer the question A and fulfill the task B: A) Will this neuron generate the efferent nervous impulses if the amplitude of single EPSP and IPSP appeared on the axonal hillock`s membrane equals 1 mV? Why? B) Name the state of this neuron and name the type of summation

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 4TAHL: Assume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and...

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Similar questions

What is the expected resting membrane potential (in mV) of a neuron that is typical in all ways except for possessing an intracellular potassium concentration of 94 mM and double the normal resting permeability to sodium?
If a postsynaptic cell has synapses from five different cells, and three cause EPSPs and two of them cause IPSPs, give an example of a series of depolarizations and hyperpolarizations that would result in the neuron reaching threshold.
If extracellular [Na1] is elevated, how would the resting potential and action potential of a neuron change?
If the postsynaptic cell's plasma membrane were to become substantially more permeable to Na+, you would expect the membrane potential to [depolarize, hyperpolarize] __________________. You would expect the membrane potential to depolarize if the extracellular K+ concentration were to [increase, decrease] ______________. a.) hyperpolarize, decrease b.) depolarize, decrease c.) depolarize, decrease d.) hyperpolarize, increase
Sequence the following list of events of a neuronal action potential by placing 1 next to the first event, 2 next to the second event, and so on. a. _____ The activation gates of voltage-gated Na+ channels open, Na+ flood the cytoplasm, and depolarization occurs. b. _____ K+ continue to flow out of the axon until the membrane is hyperpolarized. c. _____ Local potentials cause the membrane to depolarize to threshold. d. _____ The inactivation gates of voltage-gated Na+ channels close as voltage-gated K+ channels open, K+ begin to exit the axon, and repolarization begins. e. _____ Repolarization continues and Na+ channels return to resting
Why is the resting membrane potential a negative value? And how do you determine resting membrane potential?
The extracellular sodium [Na+]0 is reduced in the saline bath. Following another current injection in a neuron, the membrane potential changes were recorded. a) Why has the membrane potential changed following the Na+ reduction? b) Why has the current injection produced no action potentials? c) How might you experimentally rescue action potential generation?
At the peak of an action potential, would the relative permeability of Na be higher than K? Which ion would be the least permeable to the membrane during falling phase?
Draw details of the repolarization phase of an action potential from the following descriptions of the sequences of AfterHyperPolarization (AHP) and AfterDePolarization (ADP) sequences. Make the distinct phases clear and noticeable (5 % each) A complex AHP consisting of a first component AHP, an ADP, and a second component AHP before repolarization to resting membrane potential a first fast AHP component, followed by a slower AHP, followed by a fast ADP, and a second late AHP component before repolarization to rest
the potassium leak channels were suddenly blocked in a resting neuron, what would happen to its resting membrane potential?
Imagine that a toxin creates pores that are permeable to Ca2+. Describe its immediate effect on the resting potential of the neuron: identify which ions diffuse across the membrane, which direction they diffuse (and why), and whether this brings the neuron closer to or further from threshold potential. asap please
Draw a typical action potential (correctly label axis) and explain in words the roles of ion channels in generating the different phases of the action potential. (Extra credit: How would opening voltage gated calcium channels upon depolarization affect the shape of the action potential if they have a relatively slow inactivation rate?)