Name and describe the roles of key molecules and membrane structures in maintaining axon membrane resting potential of-70 mV Name and describe the roles of key molecules and membrane structures in propagation of axon membrane action potentials during depolarization at +35 mV  Explain why they myelin sheath of white matter neurons allows faster action potential transmission than that of neurons found in gray matter.

Q: A neuron with a resting membrane potential of -75 mV receives multiple inputs giving rise to the…

A: The action potential is a condition of a nerve impulse or electrical activity when there is a…

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: Which refers to the time during which a neuron can undergo an action potential? O the resting…

A: Nervous system is one of the most important system of our body it send and receive information via a…

Q: A change in the axon membrane potential from -70 mV to -64 mV would be called a depolarization…

A: RESTING MEMBRANE POTENTIAL: The ground value of a trans-membrane voltage that remains static unless…

Q: You are recording the electrical activity of a cell body with a resting membrane potential of -70…

A: Given; Resting membrane potential of the cell= -70mV No. of stimuli detected by the cell= 3 from…

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: 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 a typical action potential (correctly label axis) and explain in words the roles of ion…

A: An action potential (AP) occurs when the membrane potential of a particular cell position rises…

Q: A 100-um diameter nerve axon has the following properties: rm = 2.5 x 104 ohm x cm, ri = 1 x 105…

A: The resting Vm is the membrane potential when no current is flowing through the axon. It is the…

Q: Choose the item in column 2 that best matches each item in column 1…

A: The nervous system of our body is concerned with the functions of sensory reception, processing, and…

Q: Describe how resting potential is form in a neuron. Key difference from in and out a neuron and how…

A: The resting potential of a neurone is formed from the difference in concentration of different…

Q: For a nerve fibre axoplasmic and extracellular ion concentrations were found to be respectively:…

A: An equilibrium environment should be maintained both inside and outside the cell to function…

Q: At resting membrane potential for a typical neuron (-70 mV), which ion does NOT move? Na+ Ca2+ K+…

A: A resting (non-signaling) neuron has a voltage called the resting membrane potential, or simply the…

Q: LA. Action potential +40 Falled Threshold -55 initiations Resting state -70 Stimulus t Refractory…

A: Generation of nerve impulse in nerve fibre depends on distribution of sodium and potassium in and…

Q: Which is TRUE about neuronal membrane electrical and concentration gradients at the peak of the…

A: An action potential is sudden and transient changes in the voltage across a biological membrane. It…

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: Put the events for action potential generation in a neuron in the correct order (From 1-9)

A: Action potential generation is a fundamental process in neurons, allowing them to transmit…

Q: 3. Electrical Signal: The Action Potential In the figure to the left, name the 4 phases of the…

A: Action potential refers to a fast, propagating change in the resting membrane potential of a cell.…

Q: You are examining a postsynaptic neuron that has a resting membrane potential of -70 mV and a…

A: Membrane potential develops when there is difference in charge between the intracellular and…

Q: Describe the sequence of events that occur after a stimulus depolarizes the membrane from resting…

A: The resting potential tells about what happens when a neuron is very still or at rest. An action…

Q: Why does neuronal function require the voltage-gated K+ channels to open more slowly than the…

A: Voltage-gated channels are specialized proteins that are essential for the generation and…

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: The Structure of the acetylcholine receptor is shown below:   D. Briefly indicate what the role of…

A: Acetylcholine is a neurotransmitter at various synapses, nerves, and at the motor endplate of…

Q: Myasthenia gravis is a disease that leads to a marked decrease in the number of acetylcholine (Ach)…

A: Given:- Each quantum of Ach opens only 200 Ach receptor-channels instead of the normal 2000.- Each…

Q: 1.3 Quantitative effect of non-constant time constant Say that a particular neuron, X, has a set of…

A: The time constant of a membrane is a measure of how quickly it responds to a stimulus. A longer time…

Q: You generate action potentials in a neuron bathed in solution in a petri dish by applying a…

A: An action potential is a rapid sequence of changes in the voltage across a membrane. This action…

Q: What are THREE major functional characteristics of the voltage-gate Na+-channels and how do these…

A: Voltage gated sodium Ion channels are integral membrane proteins, present in the cell membrane of…

Q: At what time (in milliseconds) is the inside of the neuron the most positive and why?  Explain why…

A: The graph represents action potential in neuron.

Q: Match the stages of action potential with the appropriate image or description.   PICK AND MATCH…

A: Action potential is defined as the rapid depolarization and repolarization of the membrane…

Q: In the introduction section the authors wrote “In general, the polarity-dependent mechanisms are…

A: Anodal stimulation is a type of electrical stimulation that involves passing a positive electric…

Q: Would anyone be able to explain these different channels? I would like an explanation as to why…

A: All ion channels are primarily located at their respective sites depending on their response to that…

Q: In an experiment, the extracellular [Na+] surrounding a nerve cell was reduced from 145 to 45 mM.…

A: In the presence and absence of an impulse, the nerve cells exist in two states known as action…

Q: 3) You are investigating the ionic selectivity of an ion channel opened by activation of a specific…

A: A.                                   E(K+)= RTnFlnOUTIN=8.314×2981×96485ln5140=-0.089≈-89mV…

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: Na+] outside = .3 mM [Na+] inside the presynaptic cell = .01 mM [dopamine] inside = .5 mM…

A: Active transport It is defined as the transport of molecules across the cell membrane with the need…

Q: ACTION PÔTENTIAL Describe what happens in each phases of action potential and explain the following…

A: The membrane potential of a cell is determined by the unequal distribution of positive and negative…

Q: Axons can be extremely long and winding. What structural property allows them to maintain the…

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

Q: Consider the neuron below, which has a membrane resting potential of -70mV, membrane space constant…

A: