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Home Q & A Board Biology-Related Homework Help General Biology
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bklynbeauty86 bklynbeauty86
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6 years ago
When the membrane potential of a neuron reaches the threshold level:a.
   voltage-gated sodium channels open, and sodium diffuses out of the cell.
  b. voltage-gated potassium channels open for a very brief period.
  c. voltage-gated sodium channels close, so sodium cannot diffuse out of the cell.
  d. the sodium channel protein changes its shape to open the gates of the channel.
  e. the membrane potential is more negative than when at rest.

Question 2

When the dentist gives you a shot of Novocain, why to you not feel any pain when s/he drills into your
  tooth?
  a. The neuron remains in the depolarized state.
  b. A transmembrane potential does not form.
  c. The drug decreases the external Na+ concentration.
  d. Voltage-activated K+ channels are blocked.
  e. Nerve transmission is blocked
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RedishRedish
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6 years ago
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bklynbeauty86 Author
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#2
6 years ago
Thanks for your help <3
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