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What causes the rapid change in the resting membranes potential that initiates an action potential?
Wiki User
∙ 8y ago
In muscle cells the inward current is a sodium + calcium flow through acetycholine activated channels as well as through voltage sensitive calcium channels.
Wiki User
∙ 15y ago
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What is a resting motor neuron expected to do?
A resting motor neuron is expected to maintain its resting membrane potential and be ready to transmit an action potential when stimulated.
When is a nerve depolarized?
A nerve is depolarized when there is a shift in the resting membrane potential towards more positive values, usually triggered by the opening of voltage-gated ion channels. This initiates an action potential that allows for the transmission of electrical signals along the nerve cell.
When the electrical potential in a cell is in action versus a resting state the electrical charge reversal?
When a cell is in action, the electrical potential becomes more positive compared to the resting state. This is due to an influx of positively charged ions such as sodium. During the resting state, the electrical potential is negative, maintained by the concentration gradient of ions across the cell membrane.
What is the interval called during which a neuron is dormant after an action potential has been completed?
Resting potential
A resting motor neuron is expected to?
be in a polarized state, with a negative membrane potential. This resting potential allows the neuron to respond quickly to stimuli by firing action potentials when necessary.
What is a resting motor neuron expected to do?
A resting motor neuron is expected to maintain its resting membrane potential and be ready to transmit an action potential when stimulated.
When is a nerve depolarized?
A nerve is depolarized when there is a shift in the resting membrane potential towards more positive values, usually triggered by the opening of voltage-gated ion channels. This initiates an action potential that allows for the transmission of electrical signals along the nerve cell.
When the depolarization reaches about -55 mV a neuron will fire an action potential?
Yes, this threshold is known as the neuron's resting membrane potential. When the depolarization reaches -55 mV, it triggers the opening of voltage-gated sodium channels, leading to the rapid influx of sodium ions and generating an action potential. This initiates the propagation of the electrical signal along the neuron.
When the electrical potential in a cell is in action versus a resting state the electrical charge reversal?
When a cell is in action, the electrical potential becomes more positive compared to the resting state. This is due to an influx of positively charged ions such as sodium. During the resting state, the electrical potential is negative, maintained by the concentration gradient of ions across the cell membrane.
What is the interval called during which a neuron is dormant after an action potential has been completed?
Resting potential
A resting motor neuron is expected to?
be in a polarized state, with a negative membrane potential. This resting potential allows the neuron to respond quickly to stimuli by firing action potentials when necessary.
During an action potential hyperpolarization beyond more negative to the resting membrane potential is primarily due to?
Potential hyperpolarization are more negative to the resting membrane potential because of voltage. This is taught in biology.
What restores and puts the cell membrane to resting conditions after an action potential?
Calcium
Are neurotransmitters that depress the resting potential called excitatory?
No, neurotransmitters that depress the resting potential are called inhibitory neurotransmitters. Excitatory neurotransmitters have the opposite effect, causing depolarization and increasing the likelihood of an action potential.
Action potential will be propagated only after a sufficiently large resting membrane potential has been achieved in the direction of?
depolarization
Arrange these action potential events in their proper sequence?
The correct sequence of action potential events is: 1. Resting membrane potential, 2. Depolarization, 3. Repolarization, 4. Hyperpolarization.
What is the situation like prior to an action potential?
Prior to an action potential, a neuron is in a resting state with a negative membrane potential due to the uneven distribution of ions across its cell membrane. This resting state is maintained by ion channels that selectively allow the passage of specific ions.
