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What has to be crossed before the neuron fires?
The threshold potential must be reached for the neuron to fire. This is the level of depolarization that triggers an action potential to be generated and propagated along the neuron.
A slap on the back is more painful than a pat on the back because a slap triggers?
A slap on the back is more painful than a pat on the back because a slap triggers more intense neural impulses. The slap cause more neuron to fire, and to fire more often.
A slap on the back is more painful than a pat on the back because a slap triggers what?
A slap on the back is more painful than a pat on the back because a slap triggers more intense neural impulses. The slap cause more neuron to fire, and to fire more often.
When an action potential reaches the end of a neuron it triggers the release of?
neurotransmitters from the synaptic vesicles into the synapse. These neurotransmitters then bind to receptor proteins on the adjacent neuron, initiating a new action potential in the postsynaptic neuron.
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.
What part of a neuron relays signals from one neuron to another neuron or to an effector?
The axon terminals of a neuron are responsible for relaying signals from one neuron to another neuron or to an effector, such as a muscle or gland. When an action potential travels down the axon, it triggers the release of neurotransmitters at the axon terminals, which then stimulate the next neuron or target cell.
What is the trigger point at which a neuron will fire called?
Its where there are a lot of sodium channels. Once the trigger zone is 'triggered' to threshold (from -70mV to -55mv), then an action potential occurs. trigger zone in MOTOR neurons are in the axon hillock and in SENSORY neurons, they're in the 1st unmyelinated area (first node of ranvier).
What is signal sending a neuron called?
The signal sent by a neuron is called an action potential. This electrical impulse travels along the neuron's axon and triggers the release of neurotransmitters at the synapse to communicate with other neurons or target cells.
Why is that electrical impulses cannot pass from neuron to muscle cell?
The synapse, or connection, between a neuron and striated muscle is typically a chemical one called the neuromuscular junction. The pre-synaptic terminus coming from the neuron releases acetylcholine (ACh) which triggers an opening of the ionic channels on the muscle side. The depolarization triggers calcium entry into the cytosol of the muscle and contraction.
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.
How does a signal move through a neuron?
A signal moves through a neuron by traveling along the axon, which is a long, thin extension of the neuron. The signal is transmitted as an electrical impulse called an action potential. When the signal reaches the end of the axon, it triggers the release of neurotransmitters, which then carry the signal to the next neuron.
What happens when a neuron is stimulated by another neuron?
When a neuron is stimulated by another neuron, an action potential is generated and travels down the axon of the stimulated neuron. This action potential triggers the release of neurotransmitters at the synapse, which then binds to receptors on the postsynaptic neuron, leading to either excitation or inhibition of the postsynaptic neuron.
