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What must occur first to trigger the skeletal muscle to generate an action potential and contract?
Wiki User
∙ 9y ago
The correct one is "acetylcholine (ACh) causes temporary permeability to sodium"
sodium ions rush into the cell (this is the wrong answer, so I found out the hard way). The correct one is "acetylcholine (ACh) causes temporary permeability to sodium"
Wiki User
∙ 9y ago
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What are autorhythmic fibers?
They are fibres which generate AP(action potential) which trigger heart contractions.
Disturbances when will sensory neurons result in an action potential?
if the graded potential of threshold size reaches a trigger zone
A gene having the potential to trigger cancerous changes in a cell?
oncogene
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.
How is an action potential self-regenerating?
depolarizing currents established by the influx of Na+ flow down the axon and trigger an action potential at the next segment
Can brain biopsy cause seizures?
The resulting scar, left on the brain has the potential to trigger seizures
What are some synonyms of the word triggers?
The word trigger, when used as a verb, has several synonyms. Activate, elicit, generate, give rise to, produce, prompt, spark and start are all common synomyms for the word trigger.
What are edge triggered and level triggered interrupts?
in the case of edge trigger, it may generate unwanted interrupt when input signal has glitch and so on. on the other hand if edge trigger not seen in some special situation (eg. when process in the service routin) level trigger preffered!
Minimum level of stimulation required to trigger a neural impulse?
An action potential needs to occur to trigger the neurons but the action potential depends on whether a stimulus is able to bring the membrane potential to a certain level termed the THRESHOLD. This threshold is about -55 mV for most neurons, but the stimulus needs to bring the membrane potential to this certain level or it will not be triggered. Relating to the ALL-OR-NONE PRINCIPLE, which if the threshold is not acquired then an action potential will not occur but once a stimulus is strong enough to depolarize (making the inside of the cell less negative going from -70 mV to -55 mV) it will trigger. The resting potential is -70 mV which the stimulus needs to bring it up to -55mV.
Can wounds cause cancer?
Wounds can in fact be a cause of cancer. Everything can be a potential trigger that brings on cancer or cancer-growing agents.
What does it take to trigger an action potential?
neurotransmitters from the presynaptic neuron must be released and binded to the ligand gated sodium channels to increase the membrane potential (increase the charge) until it reaches the threshold of the trigger zone which is -55 millivolts.
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).
