what is the agent just mentioned above?
A psychoactive drug, psychopharmaceutical, or psychotropic drug is a chemical substance that changes nervous system function.
Psychoactive drug
A psychoactive drug, psychopharmaceutical, or psychotropic drug is a chemical substance that changes nervous system function and results in alterations in perception, mood, consciousness, cognition, or behavior.
what takes over the function of photosynthesis in opuntia In the absence of leaves, enlarged stems carry out photosynthesis. what is a cactus? It is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. how did they evolve? Except for a relatively recent spread of "Rhipsalis baccifera" to parts of the Old World, cacti are plants of South America and mainly southern regions of North America. This suggests the family must have evolved after the ancient continent of Gondwana split into South America and Africa, which occurred during the Early Cretaceous. how do they reproduce? Cactus flowers are pollinated by insects, birds and bats. how are they classified? Botanists, such as Philip Miller in 1754, divided cacti into several genera, which, in 1789, Antoine Laurent de Jussieu placed in his newly created family Cactaceae. who is the former person mentioned? An English botanist of Scottish descent. and the latter? A French botanist. what was his heritage? The system of suprageneric nomenclature in botany is officially dated to 4 Aug 1789 with the publication of the Genera Plantarum (Gen. Pl.). where was he from? Paris what was his contribution to his field? He is notable as the first to publish a natural classification of flowering plants; much of his system remains in use today. what does the aforementioned plant feed on? UNANSWERABLE what are its uses? They are used for human food and as fodder for animals, usually after burning off their spines. In addition to their use as psychoactive agents, some cacti are employed in herbal medicine.
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Psychoactive drug [SEP] Introduction
A psychoactive drug, psychopharmaceutical, or psychotropic drug is a chemical substance that changes nervous system function and results in alterations in perception, mood, consciousness, cognition, or behavior. These substances may be used medically; recreationally; to purposefully improve performance or alter one's consciousness; as entheogens for ritual, spiritual, or shamanic purposes; or for research. Some categories of psychoactive drugs, which have therapeutic value, are prescribed by physicians and other healthcare practitioners. Examples include anesthetics, analgesics, anticonvulsant and antiparkinsonian drugs as well as medications used to treat neuropsychiatric disorders, such as antidepressants, anxiolytics, antipsychotics, and stimulant medications. Some psychoactive substances may be used in the detoxification and rehabilitation programs for persons dependent on or addicted to other psychoactive drugs.