A reaction by a non-human organism with behavioral and physiological elements similar to a person's response.
A person's internal state of being and involuntary physiological response to an object or a situation, based on or tied to physical state and sensory data.
The activity produced in an organ, tissue, or part, such as a nerve cell, as a result of stimulation
The act of exciting or putting in motion; the act of rousing up or awakening.
The act of producing excitement (stimulation); also, the excitement produced.
A transition of a nucleus, atom or molecule to an excited state by the absorption of a quantum of energy; the opposite of relaxation