What effect would a chemical that blocks the voltagegated sodium ion channels in the excitable axon membrane of a neuron have on its ability to depolarize?

Q: When a neuron is at resting potential, what is the internal charge of the neuron?

A: Neurons are a type of cells and a functional unit of the nervous system which is used to transmit…

Q: What will happen when ligand gated sodium channels open on a neuron? What will enter/exit the cell?…

A: Ligand-containing ion channels bind to neurotransmitters and are open to responding to ligand…

Q: A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then…

A: Plasma membrane always try to maintain potential difference between the sides of the extracellular…

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: Which of the following choices correctly fills in the blanks? After repolarization, the sodium ions…

A: The action potential is the process by which the signal propagates through the neurons, and this…

Q: What do you think would happen to the neuronal action potential if the concentration of sodium ions…

A: An action potential has many different stages; hypopolarization, depolarization, overshoot,…

Q: Tetrodotoxin is a poison that prevents voltage-gated channels from opening. Would this toxin prevent…

A: Tetrodotoxin is a potential neurotoxin which is extremely poisonous and can be found in the liver…

Q: Why doesn’t an action potential that is propagated down an axon go in the reverse direction

A: Introduction Neurons are the small cells or units which are responsible for conducting electrical…

Q: Define the terms Myelinization and saltatory conduction of action potentials?

A: Myelination and salutatory conduction have a strong effect on the action potential. It is studied…

Q: hen a neuron opens voltage-gated Na+ channels, what happens to the membrane potential?

A: Introduction: Voltage-gated Na+ channels initiate and propagate action potentials in neurons and…

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: What happens to Na+ when a neuron is stimulated on its dendrite? Why does the movement of Na+ raise…

A: When different ions cross the neuron membrane action potentials is  induced. A stimulus first…

Q: List the series of events at the membrane that generate an action potential, including the…

A: The objective of the question is to understand the sequence of events that occur at the membrane to…

Q: Identify the stages involved during the changes in membrane potential of the neuron represented in…

A: Nervous system is an important system which helps in maintaining the homeostasis of the human body.…

Q: Describe how gating of Na+ and K+ in the axon membrane results in the production of an action…

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

Q: What happens at the nodes of Ranvier in a myelinated axon?

A: Introduction: Myelinated axons have microscopic gaps within them called nodes of Ranvier. These gaps…

Q: Why is the cell unable to initiate another action potential if stimulated during the refractory…

A: The time between two consecutive action potentials is called refractory period. Action potential…

Q: Describe how the permeability of the axon membrane to Na+ and K+ is regulated and how changes in…

A: Introduction  Sodium and Potassium are the two most important ions which plays a crucial role in…

Q: what would happen to the action potential if the potassium channels opened before the sodium channel

A: Neurons and muscles have cells that generate an action potential in response to stimuli. These are…

Q: ou observe that a neuron treated with a metabolic inhibitor which prevents ATP generation still can…

A: Neurons are the basic unit of the nervous system. The lipid bilayer is selectively permeable and is…

Q: Calcium ions a)Help control the membrane threshold voltage. b)Reduce axon permeability to Na+.…

A: sensory input-afferent information travels from the outside environment to brain environment.

Q: After an action potential has been initiated, there are two processes that prevent the membrane from…

A: The generation of action potential is very much important characteristics in nerve cells that is…

Q: If sodium and potassium ions are both positively charged, what causes the negative membrane…

A: Resting membrane potential is defined as the difference in the electric potential across the plasma…

Q: A neurotoxin was delivered to a patient that prevented sodium channels from opening at the axon…

A: Action potential is just rise and fall of membrane potential which generates signals to various…

Q: What happens if a potassium channel opened before sodium channels during the action potential…

A: Rapid change in the membrane voltage across the cell membrane is called as action potential. This…

Q: How can an EPSPs ability to stimulate action potential be enhanced?

A: The neuron is a specialized cell that is capable of generating an action potential on the cell…

Q: What is the importance of the sodium-potassium pump in neuron function? What do you think would be…

A: An action potential is an important property of several electrically excitable cells that results in…

Q: After the depolarisation phase of an action potential, the resting potential is restored by ______.

A: Introduction An action potential is defined as a sudden fall or rise in the potential of the…

Q: Assume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an…

A: Neurotransmitters are compounds secreted from neurons at the synapse. The neurotransmitters can…

Q: Which component of the neuron sends action potentials away from the cell body?

A: A neuron is a building block of the nervous system. There are millions of neurons present in our…

Q: Is an action potential transmitted faster between cells connected by anelectrical synapse or by a…

A: In neurophysiology, the term action potential is used to describe the electrical form of messages…

Q: Depolarization phase      --Click to select--   Chemically-gated potassium channels…

A: The Depolarization Phase of Action Potential Mechanism involves rush of the positively charged…

Q: Why is the propagation of action potential unidirectional

A: An action potential is a fast ascent and  fall in voltage or membrane potential across a cell…

Q: describe the events of neuron depolarization and repolarization

A: The action potential is referred to as the process in which there occurs variation within the…

Q: Depolarization of a neuron plasma membrane will shift the membrane potential toward (a) 0 mV. (b)…

A: The resting potential of neurons is -70 millivolts meaning that the cell’s interior is comparatively…

Q: Refer to the graph showing the course of an action potential. Which of the numbered points along the…

A: As the membrane potential is increased, sodium ion channels open, allowing the entry of sodium ions…