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Death.
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How does threshold change during the relative refractory period?
During the relative refractory period, the threshold for excitation is increased compared to the resting threshold. This is because the membrane potential is closer to its resting state, making it more difficult to depolarize the cell and generate an action potential. It requires a stronger stimulus to overcome this increased threshold and trigger another action potential.
What is the sequence of events that correlates to the sequence of events of a nerve impulse?
2,1,3,4
When a sensory neuron is excited by some form of energy the resulting graded potential is called?
The resulting graded potential is called a generator potential when a sensory neuron is excited by some form of energy. This potential may trigger an action potential if it reaches threshold.
What is the definition of time in scientific terms?
The dimension of the physical universe which orders the sequence of events at a given place; also, a designated instant in this sequence, such as the time of day, technically known as an epoch, or sometimes as an instant.
When events are arranged in time sequence from first to last they are said to be in order.?
That is correct. When events are arranged chronologically from beginning to end, they are said to be in order. This helps to create a clear timeline and understanding of how events unfolded.
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 sequence of events that follow a threshold potential?
Following a threshold potential, voltage-gated sodium channels open, allowing sodium ions to rush into the cell, depolarizing the membrane. This triggers an action potential that spreads down the length of the neuron. Once the action potential reaches the end of the neuron, it triggers the release of neurotransmitters into the synaptic cleft to communicate with the next neuron.
A neuron fires only when its membrane reaches what?
A neuron fires when its membrane reaches a certain threshold potential. This threshold potential is typically around -55 to -65 millivolts. When the membrane potential reaches this level, an action potential is triggered and the neuron fires.
What is the sequence of events along an axon?
The sequence of events along an axon involves the generation of an action potential at the axon hillock, propagation of the action potential down the axon via depolarization and repolarization of the membrane, and neurotransmitter release at the axon terminals to communicate with other neurons or target cells.
What do you call events that occur in a sequence?
You call them 'sequence of events'.
What stimulus below this intensity will result in no response in a neuron?
Any stimulus below the neuron's threshold potential will not result in a response, as it is not strong enough to generate an action potential. Neurons require a minimum level of stimulus intensity to reach the threshold potential and fire an action potential.
What is a sequence of rapidly occurring events that decrease and reverse the membrane potential and then eventually restore it to the resting state?
An action potential is a sequence of rapidly occurring events that decrease and reverse the membrane potential, followed by repolarization and ultimately restoration back to the resting state. This process involves the opening and closing of voltage-gated ion channels, resulting in the propagation of electrical signals along the neuron.
Membrane potential required to achieve threshold?
-55mV
How does threshold change during the relative refractory period?
During the relative refractory period, the threshold for excitation is increased compared to the resting threshold. This is because the membrane potential is closer to its resting state, making it more difficult to depolarize the cell and generate an action potential. It requires a stronger stimulus to overcome this increased threshold and trigger another action potential.
Minimum level of stimulation required to trigger a neural impulse?
The minimum level of stimulation required to trigger a neural impulse is known as the "threshold." This threshold is the minimum amount of neurotransmitter release or electrical stimulation needed to generate an action potential in a neuron. Below this threshold, the neuron will not fire an action potential.
When several neurons are stimulated equally which one will fire first?
The neuron with the lowest threshold potential will fire first when several neurons are stimulated equally. Threshold potential is the minimum level of depolarization needed to trigger an action potential in a neuron. Neurons with lower threshold potentials are more excitable and will fire before neurons with higher threshold potentials.
Is it possible to have a partial action potential?
No, action potentials are all-or-nothing events that either reach their full potential or do not occur at all. Once the threshold is met, the action potential will propagate along the neuron without diminishing in strength.
