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MMLU / A researcher is experimenting with nerve transmission using neurons from a giant…

Problem

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question

A researcher is experimenting with nerve transmission using neurons from a giant squid. At the beginning of the experiment, the axon is at rest and has a threshold measured at –70 mV at 37oC. The axon receives one stimulus that triggers one action potential in the axon. Subsequent stimuli are much stronger. Which of the following statements explains what happens when several strong stimuli are experienced by the axon?

choices

  1. The axon becomes hyperpolarized to –90 mV.
  2. The axon becomes hyperpolarized to –50 mV.
  3. The strength of the action potential becomes greater.
  4. The frequency of the action potential increases.

subject

high_school_biology

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