Each of the questions or incomplete statements below is...

Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case. Agonists are psychoactive drugs that (A) produce tolerance to the drug without the associated withdrawal symptoms. (B) mimic and produce the same effect as certain neurotransmitters. (C) mimic neurotransmitters and block their receptor sites. (D) enhance the effects of certain opiates like heroin. (E) make recovery from physical addiction more difficult.

Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
Agonists are psychoactive drugs that
(A) produce tolerance to the drug without the associated withdrawal symptoms.
(B) mimic and produce the same effect as certain neurotransmitters.
(C) mimic neurotransmitters and block their receptor sites.
(D) enhance the effects of certain opiates like heroin.
(E) make recovery from physical addiction more difficult.

Key Concepts

Agonists

Agonists are compounds that bind to receptors in the body, mimicking the action of naturally occurring substances. When an agonist binds to its receptor, it activates the receptor, triggering a response similar to that produced by the endogenous ligand.

Neurotransmitter Receptors

Neurotransmitter receptors are protein structures located on cell membranes that bind to specific neurotransmitters. Agonists target these receptors to imitate the effects of naturally occurring neurotransmitters, influencing signal transmission in the nervous system.

Psychoactive Drug Mechanisms

In psychopharmacology, the action mechanism of psychoactive drugs often involves the direct interaction with brain receptors. Agonists in this context produce effects by simulating the activity of specific neurotransmitters, thereby altering mood, perception, or behavior.

Transcript

00:01 Hi guys, today we're looking at the question.

00:04 Agonists are psychoactive drugs that.

00:07 Okay, so basically what are agonists? and before we go into our answer options, i think it's going to be helpful to go in knowing a little bit about agonists.

00:19 So agonists are basically just going to be chemicals, first of all, and they're going to attach to receptors in our brain.

00:31 And by attaching they're going to produce a response in the brain leading to a biological reaction or response let me make this an arrow as a signifying for leading to bio response so an example is going to be something like morphine morphine is going to be a chemical that mimics endorphins and produces is an endorphin response when attached to an opioid, sorry, an opioid receptor, hard word.

01:13 And it's going to be used for pain relief a lot of times.

01:16 Okay, so now that we know a little bit, i think it's going to be helpful to go into the question.

01:21 So i'm just going to rewrite this, agonists.

01:26 All right, let's start with a.

01:28 A, produce tolerance to the drug without associated withdrawal symptoms.

01:37 Tolerance, no, withdrawal.

01:41 Right away, i'm going to tell you this is probably not accurate because that's not what agonists are often used for.

01:49 Rather, they're used for eliciting a specific response when, eliciting a specific response from a neurotransmitter when we're not getting enough of a response from that neurotransmitter.

02:03 So we use an agonist to mimic the response.

02:06 So a is not going to be it.

02:09 Then we have b, mimic and produce.

02:11 The same effect as certain neurotransmitters.

02:14 So mimic, not mike, sorry.

02:20 There we go.

02:22 Mimic plus produce nt for neurotransmitter.

02:31 This is going to be a lot closer because that's what agonist's role is, is to produce an effect that would usually be produced by a neurotransmitter, but instead we're using an agonist to trigger that effect to trigger a desired response.

02:47 So b is going to be pretty close, but let's look at c through e.

02:51 Mimic neurotransmitters and block their receptor sites...

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