Predict the expected consequence(s)of applying a toxin that blocks voltage-gated Ca²⁺ channels in a neuron. A)No resting membrane potential would be observed (i.e. ,measures at 0 mV). B)A rapid increase in membrane potential at threshold voltage would not occur. C)Membrane potential would increase rapidly to peak with an action potential,but would not decrease immediately afterwards. D)The neuron would become hyperpolarizeD. E)Neuron conducts action potentials normally,but would not transmit these potentials across chemical synapses.

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Quizplus · Accepted Answer

Blocking voltage-gated calcium channels would primarily affect the release of neurotransmitters at the synapse, which is essential for transmitting action potentials across chemical synapses. The other processes mentioned (resting membrane potential, rapid increase in membrane potential at threshold, and repolarization after an action potential) are mainly dependent on sodium and potassium channels, not calcium channels.

Predict the Expected Consequence(s)of Applying a Toxin That Blocks Voltage-Gated