Blocking voltage-gated K+ channels would have which of the following effect on nerve function?

Question

Blocking voltage-gated K+ channels would have which of the following effect on nerve function?

the action potential could not repolarize

the after-hyperpolarization would not occur

neurotransmitter would not be released from the axon terminal

an action potential could not occur

Answer 1

All of the above statements are true. Blocking voltage-gated K+ channels would prevent the proper repolarization of the cell membrane during an action potential, leading to an inability to generate subsequent action potentials. This would also result in the absence of after-hyperpolarization, which is important for resetting the membrane potential after an action potential. Additionally, without proper repolarization, the neurotransmitter release from the axon terminal would be impaired.