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The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.
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∙ 13y ago
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What triggers at a point in which a neuron will fire?
Threshold
Why causes the neurons fire?
Neurons are nerve cells, and they fire to relay messages from neuron to neuron. Neurons fire when a charge jumps across a synapse to the dendrite of a cell. The neuron then fires the charge down it's axon, and the charge travels to the next neuron.
What are functions of synaptic junction?
To "connect" two neurons, (or a neuron and a muscle cell), by providing a space between an axon terminal of one neuron and a dendrite of another neuron (or a muscle cell), so neurotransmitters that are released by an axon terminal can diffuse across that space to reach the dendrite (or muscle cell) and either initiate the possibility of the second neuron to fire or cause a muscle cell to contract.
Can a neuron fire half of its neurotransmitters?
no it's an "all or nothing"
A neuron starts to fire an impulse by the influx of what ions?
sodium
Why would a lack of neurotransmitters cause problems?
neurotransmitters send signals from neuron to neuron
What is presynaptic inhibition?
Inhibition of a stimulatory neuron before it synapses, by inhibiting Ca2+ entry and blocking downstream processes, preventing neurotransmitter release, and therefore preventing the neuron generating and EPSP post-synaptically.
Is the neuron ready to fire during the refractory period?
Refractory period
Certain mental problems are thought to be caused by not having enough neurotransmitters. Why would a lack of neurotransmitters cause problems?
Neurotransmitters send signals from neuron to neuron
What is mean by the all or none response of a neuron?
The simplest sense, the all-or-none principle of neuronal firing means that a neuron will either fire or it won't, there is no "half" firing. When a neuron receives excitatory input.
What is happening when you are thinking?
When you are thinking, your brain is actively processing and organizing information in order to generate ideas, solve problems, or make decisions. This process involves complex neural pathways and connections between different regions of the brain, such as the prefrontal cortex, hippocampus, and basal ganglia. Neurotransmitters and electrical signals facilitate communication between neurons, enabling the cognitive processes that occur during thinking.
How many times can a neuron fire per second?
Depends on the function of the neuron, the range goes from once per sec to 1000 pulses per sec.
