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Both Warren Harding and Calvin Coolidge failed to serve out their presidential terms.
Norepinephrine
A neurotransmitter and hormone involved in the body's fight-or-flight response, affecting heart rate and blood pressure.
Muscarinic Receptors
A type of acetylcholine receptor found predominantly in the central and peripheral nervous systems, playing a key role in the parasympathetic nervous system.
Acetylcholine
A neurotransmitter in the nervous system that plays an important role in muscle contraction and cognitive functions.
Effector Cells
Cells that perform a response in the body after receiving a signal, such as T-cells and B-cells in the immune system attacking pathogens.
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