Action Potentials Are Described as Being 'All-Or-None

question 21

Multiple Choice

Action potentials are described as being 'all-or-none'. This property means that ______.

• A) action potentials do not vary in size dependent upon the size of the stimulus
• B) an axon can only fire one action potential at a time
• C) for an action potential to be triggered all of the sodium channels in the membrane need to open
• D) if a sensory neuron experiences a stimulus below the threshold potential it will produce a small action potential

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