Examlex
Which of these is NOT a location of mucous membranes?
Threshold
The minimum level of stimulus intensity required for a stimulus to be detected or for a response to occur.
Endorphins
Neurotransmitters produced in the brain that act as natural painkillers and also improve mood, often released in response to stress or exercise.
Norepinephrine
A neurotransmitter and hormone involved in arousal, alertness, and the regulation of blood pressure.
Dopamine
A neurotransmitter involved in many functions, including motivation, reward, reinforcement, and motor control.
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