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Which statement is true concerning the focus of expansion?
Sodium Ions
Positively charged atoms (cations) of sodium, crucial for various physiological processes including nerve impulse transmission and muscle contraction.
Serotonin
Serotonin is a neurotransmitter that has a key role in stabilizing mood, feelings of well-being, and happiness, as well as regulating sleep, digestion, and other bodily functions.
Dopamine
A neurotransmitter involved in many functions, including mood, sleep, learning, motivation, and reward.
Myelin Sheath
A fatty covering that surrounds and insulates nerve fibers, speeding up the transmission of nerve impulses.
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