0
When under what conditions will a local depolarization not lead to the action potential?
Wiki User
∙ 6y ago
If ion pumps open to hyperpolarize the neuron (chloride ions flowing into the neuron) elsewhere, leading to a net polarization/hyperpolarization, then the action potential will not be created.In order for the AP to be induced, a NET depolarization (influx of cations) must be created above the membrane threshold.
Wiki User
∙ 6y ago
Add your answer:
Earn +20 pts
What is the difference between local potential and action potential?
Local Potentials: Ligand regulated, may be depolarizing or hyperpolarizing, reversible, local, decremental Action Potentials: Voltage regulated, begins with depolarization, irreversible, self-propagating, nondecremental.
What causes Local depolarization that leads to generate action potential?
Opening of sodium channels and the fact that potassium channels are still closed leads to rapid depolarization that may lead to the neuron firing.
What is a simple neural receptor?
A receptor (protein) on a neuron that receives stimulus (light, pressure, chemical...etc). The stimulus generates a receptor potential (local disturbance/slight depolarization in membrane potential).
How action potential is generated along a myelinated neurone?
By voltage fluctuations associated with dendrosomatic synaptic activity.(I'm not sure if this answer is correct)Here's the correct answer in better detail:a. Generation of an action potential involves a transient increase in Na+ permeability, followed by restoration of Na+ impermeability, and then a short-lived increase in K+ permeability.b. Propagation, or transmission, of an action potential occurs as the local currents of an area undergoing depolarization cause depolarization of the forward adjacent area.
A series of similar stimuli that increases change in local membrane potential is called?
Action potential
What are the events that must occur to generate action potential?
Local polarization is the first step. Next the generation and propagation of an action potential. Lastly repolarization has to take place.
How is the electricity in a action potential generated?
Generally speaking the neuron is becoming depolarized, but to be more specific Phases of Action Potential: 1. Resting Potential: Vm = -65mV 2. Rising Phase: Vm = 40mV; Rapid depolarization of the membrane. 3. Overshoot: When the inside of the neuron is positively charged with respect to the outside of the membrane. 4. Falling Phase: Rapid depolarization until the membrane in more negative than the resting potential (-65mV) a. The last part of the falling phase is called the undershoot, or after-hyperpolarization.
What does it mean when a graded potential is called graded Why does it get this name?
Greded Is the membrane voltage change in response to a change in membrane permeability by adding or taking out gate channel. Depolarization occurs when there is a change in voltage towards a positive values b/c of opening up Na+ gate channels Hyperpolarization occurs when there is a more negative change in voltage due to opening up Cl- or K+ gate channels. It is called "graded" b/c you can open up some or many channels so the depolarization or hyperpolarization can be big or small Graded potentials start in one spot b/c of a change in permeability and then spreads to others as it travels; called local circuit current. The strength of graded potentials decreases as it spreads along the axon and eventually dies If you inject negative ions into the cell a hyperpolarization occurs If you inject positive ions into the cell a depolarization occurs If you inject a lot of positive charge the membrane depolarizes past 0 creates action potential and then comes back down' You get action potential once you pass the threshold voltage potential. Is a rapid depolarization which repolarizes
Are action potential and local potential reversible?
Under normal circumstances action potential will proceed unilaterally. An action potential cannot proceed down an axon and depolarize in the reverse direction on the same axon. It must carry information on one axon in one direction and then on another axon in a separate direction. In a lab you can depolarize neurons in the middle of an axon and it will depolarize bilaterally.
Spontaneous developing local potential in heart?
pacemaker potential
The spontaneously developing local potential that occurs at the sa node is called the?
pacemaker potential
Were to get an Action Replay?
Most local gamestops have action replay.
