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Chi-square values are always greater than or equal to zero.
Artificial Neurotransmitter
A synthetically produced chemical used to emulate the effects of natural neurotransmitters in the nervous system.
Endogenous Neurotransmitter
A type of neurotransmitter naturally produced within the body that facilitates communication between neurons in the nervous system.
Neurotransmitter
Chemical messengers that transmit signals across a chemical synapse, from one neuron to another target neuron.
Receptor
A protein molecule that receives and responds to chemical signals, such as hormones or neurotransmitters, affecting cell function.
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