Jeremy Is Sitting Quietly When the Muscles in His Left

question 39

Multiple Choice

Jeremy is sitting quietly when the muscles in his left leg begin to "twitch." This activation of movement in his voluntary muscles is most likely due to the release of the neurotransmitter

• A) serotonin.
• B) dopamine.
• C) acetylcholine.
• D) norepinephrine.

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Definitions:

Phase Currents

The electric current flowing through one phase of a multi-phase system.

Neutral Conductor

The conductor in an electrical system that is grounded and carries current only under fault conditions, providing a path for current to return to its source in a balanced system.

True-RMS Indicating Ammeter

An electrical measuring instrument that accurately measures the root mean square (RMS) of a varying current, reflecting true power even in non-sinusoidal situations.

Average-Indicating Ammeter

A device used to measure the average current flowing through a circuit.