Q: A patient who has developed tolerance to morphine requires higher doses to achieve the same effect. Which equation best describes the relationship between dose and effect in the presence of tolerance?

$$E = E_{max} \cdot \frac{[D]}{K_D' + [D]}$$ \\ (where $$K_D' is $$increased due to tolerance)

Question 1

Which neurotransmitter is most directly involved in the reward pathway activated by most addictive drugs?

Accepted Answer

Dopamine

Question 2

According to the opponent-process theory of addiction, what is the primary reason for the development of drug tolerance and withdrawal symptoms?

Accepted Answer

The body initiates counteracting processes to maintain homeostasis, resulting in diminished drug effects and negative symptoms upon cessation

Question 3

A patient who has developed tolerance to morphine requires higher doses to achieve the same effect. Which equation best describes the relationship between dose and effect in the presence of tolerance?

Accepted Answer

$$E = E_{max} \cdot \frac{[D]}{K_D' + [D]}$$ \ (where $$K_D' is $$increased due to tolerance)

Question 4

Which of the following best explains why environmental cues can trigger relapse in individuals recovering from drug addiction?

Accepted Answer

Environmental cues become associated with drug use through classical conditioning, activating the reward pathway

Question 5

Methamphetamine use is associated with changes in which brain region that is critical for memory and learning?

Accepted Answer

Hippocampus

Question 6

Which schedule of drug self-administration is most likely to produce the highest rates of responding in animal models?

Accepted Answer

Variable-ratio

Question 7

A person with a genetic predisposition to addiction is exposed to repeated drug use in a stressful environment. Which concept best describes the interaction of these factors?

Accepted Answer

Epigenetics

Question 8

Which of the following drugs is most likely to cause physical dependence characterized by withdrawal symptoms upon cessation?

Accepted Answer

Heroin

Question 9

According to the DSM-5, which of the following is NOT considered a substance-related addiction?

Accepted Answer

Internet gaming

Question 10

Which of the following statements about the mesolimbic dopamine pathway is correct?

Accepted Answer

It is activated by most drugs of abuse and mediates reward

Question 11

A researcher finds that after repeated cocaine exposure, mice show increased locomotor activity at lower doses. This phenomenon is best described as:

Accepted Answer

Sensitization

Question 12

Which of the following best describes the process of allostasis in the context of drug addiction?

Accepted Answer

The body maintains stability by changing its set point in response to chronic drug exposure

Question 13

Which of the following is a key feature distinguishing physical dependence from psychological dependence?

Accepted Answer

Physical dependence involves withdrawal symptoms upon cessation

Question 14

A patient reports using alcohol to cope with anxiety and cocaine to cope with depression. This pattern of drug use is best explained by:

Accepted Answer

Self-medication hypothesis

Question 15

Which of the following is most likely to increase the risk of developing addiction in an individual?

Accepted Answer

Having a parent with a history of substance abuse

Question 16

Which of the following best describes the role of the transcription factor $$\Delta$$FosB in drug addiction?

Accepted Answer

$$\Delta$$FosB accumulates in the nucleus accumbens with repeated drug exposure

Question 17

Which of the following is NOT a component of the extended amygdala?

Accepted Answer

Ventral tegmental area

Question 18

Which of the following best describes the concept of incentive-sensitization in addiction?

Accepted Answer

It distinguishes between drug seeking and drug taking behaviors

Question 19

Which of the following statements about the transition from recreational drug use to compulsive drug-seeking is correct?

Accepted Answer

It is associated with changes in the prefrontal cortex and striatum

Question 20

Which of the following best describes the effect of chronic drug use on the threshold for rewarding brain stimulation?

Accepted Answer

Chronic drug use increases the threshold, making it harder to experience reward

Study Guide: Drug Abuse and Addiction (Psychopharmacology, Ch. 9)

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