THE PSYCHOLOGY OF EMOTIONS
STATES OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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are able to pass through the blood-brain barrier
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activate mood altering hormones
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are antagonists for our bodies neurotransmitters
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directly travel to the frontal cortex
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Detailed explanation-1: -Any drug that distorts the operations of the central nervous system (CNS) is considered a psychoactive drug. Each of these drugs has the capacity to enter the bloodstream, circulate throughout the body and cross the blood brain barrier, altering the function of the CNS. Many psychoactive drugs become drugs of abuse.
Detailed explanation-2: -The distance between capillaries in brain is about 40 m (Figure 1C). Even a large molecule antibody drug diffuses 40 m within a second. Therefore, once a drug is delivered across the BBB from blood, there is instantaneous equilibration of drug throughout the entire brain volume.
Detailed explanation-3: -The blood-brain barrier (BBB) has been a great hurdle for brain drug delivery. The BBB in healthy brain is a diffusion barrier essential for protecting normal brain function by impeding most compounds from transiting from the blood to the brain; only small molecules can cross the BBB.