Examlex
Punctuated equilibrium is a sustained directional shift in a population's average characteristics.
Serotonin
A neurotransmitter that contributes to feelings of well-being and happiness.
Neurotransmitters
Chemical substances that transmit signals across a synapse from one neuron to another in the brain or body.
Sensory Perception
The process of receiving and interpreting sensory information from the environment through the senses.
Receptor Site
Specific regions on the surface of a cell or within a cell where molecules such as hormones, neurotransmitters, or drugs can bind to elicit a physiological response.
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