Examlex
The blood type AB+ is referred to as the universal donor.
Fear
An emotional response to perceived dangers or threats, leading to physiological and behavioral changes aimed at avoiding those threats.
Basic Emotions
Fundamental emotions that are universally recognized and experienced by humans, such as happiness, sadness, fear, disgust, surprise, and anger.
Facial Expressions
Visible changes in the face that convey an individual's emotional state or reactions to various situations.
Neurotransmitter
Chemical substances in the brain that transmit signals from one neuron to another, playing key roles in mood, cognition, and behavior.
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