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Describe how evolutionary theory explains the importance of early emotions for survival.
Ion
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons, essential in a wide array of biological processes.
Acetylcholinesterase
Enzyme found in the synaptic cleft that causes the breakdown of acetylcholine to acetic acid and choline, thus limiting the stimulatory effect of acetylcholine.
Acetylcholine
A neurotransmitter involved in many functions including muscle contraction and the transmission of nerve impulses in the central and peripheral nervous system.
Synapse
The junction between two neurons, where electrical or chemical signals are transmitted from one neuron to another.
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