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In order for Neurons to communicate, Resting Membrane Potential must CHANGE. Examples of changes in Membrane Potential included Graded Potentials and Action Potentials. In order for there to be a change in membrane potential, ions must move across the plasma membrane. There are THREE Primary types of Ion Channels: Passive (Leak) Channels, Voltage-gated Channels and Chemically-gated Channels.

DIRECTIONS

Select ONE type of Ion Channel and indicate whether that Ion Channel is MOST important for producing Resting Membrane Potential, Graded Potentials or Action Potentials. Provide detailed support for your choice.

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Deanna Hettinger
Deanna HettingerLv2
28 Sep 2019

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Many ion channels are not normally open but must be gated oropened by some event. Which of the following is NOT a typical meansof opening ion channels?

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a. Binding of neurotransmitter to external binding site

b. Change in voltage across the membrane

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Summation of local potentials can lead to a(n) _______ at theaxon hillock if the _______ is reached.

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(c)opening and closing of gated channels in the membrane.

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(e)one way flow of information in neurons from axon terminals to dendrites.

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(a) +65 V

(b) +65 mV

(c) -65 V

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(b)Resting membrane potential would decrease (become more negative)

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