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If we consider the simple random sampling process as an experiment, the sample mean is
Opiatelike Neurotransmitters
Substances in the brain that act on the same receptors as opiates, playing key roles in pain relief and pleasure.
Endorphins
Neurochemicals produced in the brain that act as natural painkillers and also boost feelings of pleasure or well-being.
ACh Agonists
Substances that mimic or enhance the action of acetylcholine, a neurotransmitter involved in muscle activation and several brain functions.
Adrenal Glands
Endocrine glands located above the kidneys that produce various hormones, including adrenaline and cortisol, which help control blood sugar, burn protein and fat, react to stressors, and regulate blood pressure.
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