If an Experimenter Used the Voltage Clamp Technique to Change

question 39

Multiple Choice

If an experimenter used the voltage clamp technique to change the presynaptic voltage from -70 mV to +60 mV, what would happen to voltage-gated calcium channels?

• A) Voltage-gated calcium channels would open and pass a large amount of inward current.
• B) Voltage-gated calcium channels would open and pass a large amount of outward current.
• C) Voltage-gated calcium channels would open but no current would pass through the open channel.
• D) Voltage-gated calcium channels would not open and therefore, not pass any current.
• E) Voltage-gated calcium channels would not open but a large amount of inward current would pass across the membrane.

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