additory contex. . How do absolute and relative refractory periods contribute to the unidirectionality of an action potential? What would happen if a stimulating electrode placed halfway down an axon artificially depolarized a cell above threshold? Would an action potential be stimulated and what direction would it travel, to axon terminal, cell body, or both? Explain

Q: Describe the propagation of an action potential. Contrast this eventin myelinated and unmyelinated…

A: An action potential is produced in the body of the neuron and spread through its axon.  The action…

Q: A graded potential that achieves threshold leads to the generation of an action potential. Which one…

A: Graded potentials are made by outside stimuli in sensory neurons or by neurotransmitters discharged…

Q: a.Would an action potential travels faster in an axon with a wide diameter or a small diameter? b.…

A: The structural and functional unit of the nervous system is called a neuron. A neuron is composed of…

Q: If you inhibit the closing of sodium channels what do you predict the effect on neuronal function…

A: Action potential in neuron is the direct consequence of voltage gated sodium channel. During the…

Q: The refractory period goes from "absolute" to "relative" when:   The inactivation gate of Na+…

A: Introduction: When the stimulus strength reaches at least reach the strength of threshold, there is…

Q: describe the location of neurotansmitters within an axon and explain the relationship between…

A: Neurons are composed of specialized cells and also a basic working unit of the brain that helps to…

Q: Based on the graph, how soon could another action potential be easily initiated (at the end of the…

A: Nerve cells or muscle cells have a tendency to transmit impulses. The changes in the electrical…

Q: Where in a myelinated axon are nearly all of the ion channels concentrated?   options:   the cell…

A: In myelinated axons we see myelin layer on the surface of axon. So, we don't see ionic channels…

Q: Which of the following statements best describes the properties of a myelinated axons?     The…

A: Axons are surrounded by a multilayered protein and lipid covering, called the myelin sheath. Such…

Q: Draw 3 diagrams of the 3 types of neurons (bipolar, multipolar, unipolar) For unipolar, use the…

A:

Q: f) Parts of a Neuron A C E D F Axon (initial B segment) G I Output signal Synaptic cleft J H…

A: Neurons are the essential components of the central nervous system, the cells involved in receiving…

Q: Temporal summation refers to: summation of action potentials in the temporal cortex. summation of…

A: IntroductionThe process of summing, which encompasses both spatial and temporal summation, decides…

Q: During the relative refractory period: Can select more than one   K+ channels are open. Na+…

A: The action potential propagation is the method in which a stimulus travels through the neurons, and…

Q: A new drug opens calcium ion channels in the membrane of the postsynaptic neuron. Would this produce…

A: There are many different types of cells in the body which form various organs and organ systems. For…

Q: . What series of events stimulates a presynaptic neuron to releaseneurotransmitters?

A: One neuron communicate with the other at junctions known as Synapses. At these points, a neurons…

Q: toxin creates pores that are permeable to Ca2+. Describe its immediate effect on the resting…

A: Action potential the action potential is defined as the rapid rise and fall in the membrane…

Q: Compare and contrast graded potentials and action potentials. What are the functions of graded…

A: In animal cells, the plasma membrane expresses several types of ion channels that participate in the…

Q: The axon of neurone is stimulated experimentally with 25 mv pulse which initiates an action…

A: A neuron is made up of a soma or cell body and a neurite. Neurons transmitting signals away from the…

Q: state the functions of the following: Neuron      Cell body          Nissl bodies      Dendrites…

A: The structural and functional units of the nervous system which are capable of sending and receiving…

Q: The main function of an axon is to... genreate EPSPs or IPSPs when neurotransmitters bind their…

A: Nervous system involves highly complex part of the animal that controls and co-ordinates the actions…

Q: When is an action potential triggered? (Choose 1)     When IPSPs exceeds EPSPs   When EPSPs exceeds…

A: The development of action potential depends on the movement of specific ions into the neurons that…

Q: Absolute refractory periods in axons: Result from conformational changes in voltage gated K channels…

A: The refractory period can be defined as the alternate rest period of muscles and neurons between two…

Q: with creative freedom illustarte the events of resting potential, depolirization and repolirisation…

A: Resting membrane potential is electrical potential difference across the membrane when the cell is…

Q: Describe the events that take place during an action potential. Begin at the point where an EPSP…

A: The nervous system is the portion of a creature's body that facilitates its actions and sends…

Q: Explain the all-or-none law of action potentials, and describe the effect of increased stimulus…

A: In reaction to stimuli, the axon membrane permeability to and depends on the opening of gated…

Q: (f) Parts of a Neuron A Axon (initial B segment) G H C Synapse: The region where an Faxon terminal…

A: Neuron is the fundamental unit of the central and peripheral nervous system. Its major function is…

Q: Excitatory neurons A and B both synapse with neuron C. Neuron A releasesa neurotransmitter, and…

A: The junction between two neurons is known as a synapse and when a neuron reaches its action…

Q: Describe how following a threshold stimulus, a action potential is carried along an unmyelinated…

A: Myelination refers to the presence of a myelin sheath on the axons. Myelin sheath is composed of…

Q: When they are not being stimulated, neurons have an electrical charge across their membranes called…

A: The control and coordination of the body in humans occur by two systems: the nervous system and the…

Q: Suppose you stimulate an axon so that you generate an actionpotential at both ends at the same…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: What effect would you expect an antagonist that targets the voltage sensing domain of perisynaptic…

A: Introduction  A neuron is a specialized cell that is the fundamental unit of the nervous system. It…

Q: Compare graded and action potentials in a typical neuron. At a minimum you should include a…

A: graded potential are variable strength signals that can be transmitted over short distance ; action…

Q: If neurons fire action potentials when membrane potential reaches -50mV, how would hyperkalemia…

A: Hyperkalemia is a medical condition where there is an excess of potassium ions (K+) in the…

Q: EPSP acilitates depolarization of postsynaptic mem ne by increasing the permeability of the membrane…

A: Answer.    The correct answer is option (d) An EPSP facilitate depolarization of the postsynaptic…

Q: How does myelination affect the speed of the action potential? by increasing the concentration…

A: Neurons have the ability to generate and conduct nerve impulses that is the fundamental basis of…

Q: Describe how depolarization occurs along an unmyelinated neuronal axon

A: Propagation of action potential leads to the depolarization of neuron.

Q: explain the effect when myelin sheath in axon is damaged.

A: Introduction: Neurons (also called neurons or nerve cells) are the basic units of the brain and…

Q: Describe the series of event that occurs as an electrical signal in the presynaptic neuron is…

A: The nervous system is highly complex among different organ systems in animals. By transmitting…