Examlex
When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.
Neurotransmitters
Neurotransmitters are chemical messengers in the brain and body that transmit signals between neurons or from neurons to muscles.
Sodium Ions
Positively charged particles (Na+) that play critical roles in the body, including regulating blood pressure, muscle function, and fluid balance.
Potassium Ions
Charged particles of potassium, essential for various physiological processes including nerve transmission and muscle contraction.
Motor Neurons
Nerve cells forming part of the nervous system that are responsible for controlling the movements of muscles.
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