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Nimfa-mama [501]
3 years ago
11

A. B. C. D. Astronomy.

Biology
1 answer:
Furkat [3]3 years ago
5 0
D yeandndjdkdjdnndnddmdddmdmdmkdkd
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Answer:

This question lacks options, the options are:

a. Presynaptic; Ca2+ ions

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The correct answer is d. Tetrahydrocannabinol, the active ingredient in marijuana, binds to receptors located in the <u>presynaptic</u> terminals of certain brain neurons. It lowers the likelihood that these neurons will release <u>neurotransmitters</u> .

Explanation:

Tetrahydrocannabinol is the most abundant cannabinoid in most cannabis varieties and has the most potent psychoactive effect. Conventional neurotransmitters are water-soluble substances stored in small vesicles at the thin ends of the axon (presynaptic terminals). When a neuron generates an impulse by sending an electrical signal along the axon to the presynaptic terminals, the neurotransmitters are released from the vesicles, diffuse through a narrow intercellular space (synaptic cleft) and interact with the receptors on the surface of the recipient neuron (postsynaptic neuron). Cannabinoids cause a decrease in the release of neurotransmitters from the presynaptic terminal through the inhibition of Ca++ channels. This signaling is mediated by the βγ subunit of the G protein. The βγ subunit of the G protein inhibits the Ca channels of type N and P / Q, which are the majority in presynaptic neurons.

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