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duriing action potential, whall na+ doors are open it reaches threshold. -55mvolts
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∙ 13y ago
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When neuron stimulated enough it?
When a neuron is stimulated enough, it reaches its threshold potential and fires an action potential. This action potential travels down the axon of the neuron, allowing for the communication of signals to other neurons or cells.
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.
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell the membrane potential will?
If a resting neuron is stimulated and there is an inward flow of positive charges into the cell, the membrane potential will depolarize, meaning the inside of the cell becomes less negative. This can trigger an action potential if the depolarization reaches the threshold level.
What is high threshold means?
High threshold refers to the level of stimulus or intensity required to elicit a response from a muscle or neuron. In the context of exercise, individuals with a high threshold may require more challenging or intense exercises to effectively engage their muscles and promote strength gains.
What are the Chemicals that cross the synaptic gap and bind to receptors on another neuron called?
Neurotransmitters are the chemicals that cross the synaptic gap and bind to receptors on another neuron. These neurotransmitters play a crucial role in transmitting signals between neurons in the brain and nervous system.
A neuron fires only when its membrane reaches what?
When it reaches the nerve impulse threshold, the next neuron will fire..
A neuron reaches its trigger point when?
Action potential is nerve impulse triggered when a neuron reaches its threshold, or trigger point for firing. Threshold trigger point for a neuron's firing about negative 50 millivolts.
What is the receptor of a reflex arc?
Sensory receptor located at the distal end of a neuron or an associated sensory structure. When stimulated it creates a receptor potential, when that reaches its threshold, it will trigger 1 or more nerve impulses in the sensory neuron.
What triggers at a point in which a neuron will fire?
Threshold
What happens to a neuron when a stimulus reaches the threshold level?
It simply and completely self destructs. You see, once the threshold is reached it no longer can sustance its physical structure due to power surges. This results in an power overload just like when a star such as the sun reaches critical level and eventually explodes resulting in a Supernova.
What minimum level of a stimiulus required to activate a neuron?
threshold
When a neuron is depolarized to threshold?
1. The neuron fires an action potential, sending the electrical signal down the axon.
What stimulus below this intensity will result in no response in a neuron?
Threshold stimulus
What cause neuron to fire?
The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.
When an action potential reaches the end of a neuron it triggers the release of?
When an action potential reaches the end of a neuron, it triggers the release of neuotransmitters such as epinephrine (sympathetic) or achetylcholine (parasympathetic).
A muscle fiber will not respond to a stimulus until that stimulus reaches what?
it will not respond until it reaches the threshold level
When an impulse reaches the end of a neuron it tiggers the releases of?
Neurotransmitters
