Answer :
In the early research conducted on LSD, a lot of research focused intensively on the possibility that LSD and other psychedelics had a serotonergic basis for their action.
What is LSD?
LSD (lysergic acid diethylamide) is a synthetic chemical, made from a substance found in ergot, which is a fungus that infects rye (grain).
Today, there is a consensus that psychedelics are agonists or partial agonists at brain serotonin 5-hydroxytryptamine 2A receptors, with particular importance on those expressed on apical dendrites of neocortical pyramidal cells in layer V.
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https://brainly.com/question/26057974