Regarding psychoactive drugs,
A) both the phenomenon of "tolerance" to and the symptoms of "withdrawal" from a psychoactive drug can be explained by the positive feedback effect of the drug on the production of the endogenous neurotransmitter/neuromodulator for which the drug is an agonist.
B) Only drugs that bind to endorphin/enkephalin receptors are described as "psychoactive."
C) use of psychoactive drugs may result in physical dependence upon them.
D) both "the phenomenon of 'tolerance' to and the symptoms of 'withdrawal' from a psychoactive drug can be explained by the positive feedback effect of the drug on the production of the endogenous neurotransmitter/neuromodulator for which the drug is an agonist" and "only drugs that bind to endorphin/enkephalin receptors are described as 'psychoactive'" are correct.
E) both "the phenomenon of 'tolerance' to and the symptoms of 'withdrawal' from a psychoactive drug can be explained by the positive feedback effect of the drug on the production of the endogenous neurotransmitter/neuromodulator for which the drug is an agonist" and "use of psychoactive drugs may result in physical dependence upon them" are correct.

Question

Quizplus · Accepted Answer

The statement "the phenomenon of 'tolerance' to and the symptoms of 'withdrawal' from a psychoactive drug can be explained by the positive feedback effect of the drug on the production of the endogenous neurotransmitter/neuromodulator for which the drug is an agonist" is true, as chronic exposure to a drug can lead to downregulation of the receptors for the neurotransmitter/neuromodulator that the drug is mimicking, causing the body to produce more of it to compensate. This can lead to tolerance and withdrawal symptoms when the drug is discontinued. Additionally, the statement "use of psychoactive drugs may result in physical dependence upon them" is also true, as repeated use of certain psychoactive drugs can lead to the body becoming dependent on them for normal functioning.

Regarding Psychoactive Drugs