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When under what conditions will a local depolarization not lead to the action potential?
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.
What else can I help you with?
What causes Local depolarization that leads to generate action potential?
Local depolarization is caused by the opening of voltage-gated sodium channels in response to the binding of neurotransmitters or other stimuli. This influx of sodium ions results in membrane depolarization, reaching the threshold potential needed to generate an action potential.
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 slight shift away from the resting membrane potential in a specific region of the plasma membrane is called a?
local potential
Is action potential self propagating?
Yes, action potentials are self-propagating. Once an action potential is initiated in a neuron, it causes a local depolarization that triggers adjacent voltage-gated sodium channels to open, leading to the propagation of the signal along the axon. This process continues in a wave-like manner, allowing the action potential to travel long distances without diminishing in strength.
How are local and action potentials similar?
Local and action potentials both involve changes in membrane potential due to the movement of ions across the cell membrane. They both follow the same basic principles of depolarization and repolarization. However, action potentials occur in excitable cells like neurons and muscle cells, while local potentials are smaller, graded changes in membrane potential that occur in non-excitable cells.
How did the threshold for second action potential change as you further decrease the interval between the stimuli?
One might find how the threshold will change by inquiring the mind of a scientist at ones local college. Another way to find the answer to this question would be to research it in books at ones local library.
How is an action potential propagated down an axon after voltage-gated sodium channels open in a region of the neuron's membrane?
The entry of sodium ions into the neuron and their diffusion to adjacent areas of the membrane causes those portions of the membrane to become depolarized and results in the opening of voltage-gated sodium channels farther down the axon, which release potassium ions to the outside, returning the charge to its previous state
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 can one person smell perfume and another cannot in terms of local and action potential?
The ability to smell perfume can vary between individuals due to differences in olfactory receptor sensitivity and the efficiency of signal transduction. When a person smells perfume, volatile molecules bind to specific olfactory receptors, generating a local potential in sensory neurons. If this local potential reaches a certain threshold, it triggers an action potential that travels to the brain for interpretation. Variations in receptor density, genetic factors, or neurological conditions can affect whether an individual perceives the scent or not.
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.
