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Depolarization is caused by: K+ diffusing out of the neuron K+ being pumped out of the neuron Na+...

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Medical Sciences

  1. Depolarization is caused by:
    1. K+ diffusing out of the neuron
    2. K+ being pumped out of the neuron
    3. Na+ being pumped into the neuron
    4. Na+ diffusing into the neuron
  1. Hyperpolarization:
    1. can be caused after neurotransmitters bind to postsynapticneurons
    2. means the neuron’s internal environment is even more positivelycharged than usual
    3. can be caused by sodium ion gated channels being open
    4. each of the above is correct
  1. Typically, an unmyelinated small diameter axon would have:
    1. a faster speed of action potential transmission than amyelinated small diameter axon
    2. a slower speed of action potential transmission than anunmyelinated large diameter axon
    3. the same speed of action potential transmission as anunmyelinated large diameter axon
    4. none of the above is correct
  1. Several neurons each releasing a subthreshold level ofneurotransmitter, all at one time, leading to an action potentialin a postsynaptic neuron is an example of:
    1. hyperpolarization
    2. spatial summation
    3. temporal summation
    4. none of the above is correct
  1. Depolarization causes:
    1. the interior side of the membrane to become more negative
    2. voltage-gated sodium ion channels further down the axon toopen
    3. Na+/K+ pumps that were not working, to now start working
    4. each of the above is correct

Answer & Explanation Solved by verified expert
4.5 Ratings (996 Votes)
1st part correct answer is caused by sodium pumped into the neuron In depolarization sodium ions are actively transported into the neuron by sodium channel Diffusion does not take place 2nd part Hyperpolarization is caused after    See Answer
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