LCAS Pharmacology of Addictive Substances 2

Question 1

Benzodiazepines produce their sedative and anxiolytic effects through which primary mechanism?

Accepted Answer

Enhancing GABA-A receptor chloride ion channel activity

Answer

Benzodiazepines bind to a modulatory site on GABA-A receptors and increase the frequency of chloride channel opening, potentiating GABA's inhibitory effects throughout the CNS.

Question 2

Which statement accurately describes the pharmacology of THC (tetrahydrocannabinol)?

Accepted Answer

THC binds to CB1 receptors in the brain and CB2 receptors in peripheral tissues

Answer

THC, the primary psychoactive component of cannabis, exerts its effects by binding to endogenous cannabinoid receptors — CB1 receptors (CNS) and CB2 receptors (peripheral tissues).

Question 3

MDMA (3,4-methylenedioxymethamphetamine) produces its characteristic empathogenic effects primarily through which neurotransmitter?

Accepted Answer

Massive release of serotonin along with dopamine and norepinephrine

Answer

MDMA causes massive presynaptic release of serotonin (its primary effect) along with dopamine and norepinephrine, producing the empathogenic, entactogenic, and stimulant effects.

Question 4

Which medication used in opioid use disorder treatment is classified as a partial agonist at the mu-opioid receptor?

Accepted Answer

Buprenorphine

Answer

Buprenorphine is a partial mu-opioid receptor agonist with a high binding affinity, producing submaximal opioid effects with a ceiling on respiratory depression, making it safer for maintenance therapy.

Question 5

Naloxone reverses opioid overdose through which pharmacological mechanism?

Accepted Answer

It competitively antagonizes opioid receptors, displacing opioids

Answer

Naloxone is a competitive opioid receptor antagonist with high binding affinity that rapidly displaces opioids from receptors, reversing respiratory depression, sedation, and analgesia.

LCAS - Licensed Clinical Addiction Specialist Practice Test

LCAS - Licensed Clinical Addiction Specialist Practice Test

LCAS Pharmacology of Addictive Substances 2