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•In which plants are the psychoactive compounds morphine and THC found? Mention their Latin binomial and...

•In which plants are the psychoactive compounds morphine and THC found? Mention their Latin binomial and mode of action.
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Morphine is one of the natural plant alkaloids found in opium. Latin binomial name of opium is Papaver somniferum.

Mechanism of action-

Morphine and its metabolites act as agonists of the mu and kappa opioid receptors. The mu-opioid receptor is integral to morphine's effects on the ventral tegmental area of the brain. Morphine's activation of the reward pathway is mediated by agonism of the delta-opioid receptor in the nucleus accumbens, while modification of the respiratory system and addiction disorder is mediated by agonism of the mu-opioid receptor. The net effect of morphine is the activation of descending inhibitory pathways of the CNS as well as inhibition of the nociceptive afferent neurons of the PNS, which leads to an overall reduction of the nociceptive transmission.

THC, also known as Delta-9-Tetrahydrocannabinol, is a psychoactive ingredient found only within the marijuana plant. The binomial name of Marijuana is Cannabis sativa.

Mechanisms of action- The psychoactive effects of THC are primarily mediated by the activation of cannabinoid receptors, which result in a decrease in the concentration of the second messenger molecule cAMP through inhibition of adenylate cyclase. These possess mild antioxidant activity sufficient to protect neurons against oxidative stress, such as that produced by glutamate-induced excitotoxicity.

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