When an action potential arrives at the presynaptic membrane, depolarization occurs, opening voltage-gated channels. this allows an influx of ca2+ ions that are needed to trigger the release of neurotransmitter into the synapse. if a calcium channel blocker, such as cadmium, is injected into the presynaptic cell, which explanation best describes cadmium's effect on the transmission of the impulse?

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.