BIOLOGICAL BASES OF BEHAVIOR
THE NERVOUS AND ENDOCRINE SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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produce tolerance to the drug without associated withdrawal symptoms
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mimic and produce the same effect as certain neurotransmitters
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enhance the effects of certain opiates like heroin
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block the effect of certain neurotransmitters
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Detailed explanation-1: -Agonists are chemicals that mimic a neurotransmitter at the receptor site and, thus, strengthen its effects. An antagonist, on the other hand, blocks or impedes the normal activity of a neurotransmitter at the receptor.
Detailed explanation-2: -Agonists essentially mimic the activities of normal neurotransmitters such as Acetylcholine, and emulate a similar response from the receptors they bind to.
Detailed explanation-3: -Some drugs mimic neurotransmitters. Opioid drugs such as heroin and OxyContin, for example, chemically resemble the brain’s natural opioids sufficiently to engage and stimulate their specialized receptors.
Detailed explanation-4: -An agonist is a chemical that amplifies the effect of a neurotransmitter by binding to the receptor sites of that neurotransmitter and activating them. This is opposite of an antagonist which binds to receptors and blocks them from firing.
Detailed explanation-5: -An agonist is a substance that mimics the actions of a neurotransmitter or hormone to produce a response when it binds to a specific receptor in the brain. Opioid drugs, for example heroin and methadone, are agonists that produce responses such as ‘liking’, analgesia and respiratory depression.