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The Science of Drug Effects

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Questions and Answers

Which neurotransmitter is activated when we feel pleasure from stimuli such as food, money, love, and acceptance?

Dopamine (correct)

Serotonin

GABA

Endorphins

What happens to dopamine receptors in the brain when someone uses heroin?

They multiply

They are destroyed

They become less sensitive (correct)

They migrate to other parts of the brain

Why do higher doses of heroin become necessary as addiction develops?

The brain becomes more sensitive to dopamine

The brain produces more dopamine

The brain becomes less sensitive to dopamine (correct)

The brain produces less dopamine

Which of the following best describes negative reinforcement in the context of addiction?

The appearance of withdrawal symptoms opposite to the drug's effects Signup and view all the answers

What is the concept of sensitization in relation to drug use?

The increase in the effectiveness of a drug with repeated administration Signup and view all the answers

What is excitotoxicity?

The toxicity or damage caused by over-excitation Signup and view all the answers

Which type of reinforcement is associated with late addiction?

Negative Reinforcement Signup and view all the answers

What is the state called when the last dose of a drug wears off?

Withdrawal Signup and view all the answers

What happens to the person's experience of pain, anxiety, and diarrhea during withdrawal from opiates?

They increase Signup and view all the answers

Which of the following best describes the concept of tolerance in relation to drug use?

Tolerance is a decrease in the effectiveness of a drug that is administered repeatedly. Signup and view all the answers

What happens to the brain's reward system as heroin addiction develops?

The brain's reward system becomes depleted of dopamine receptors. Signup and view all the answers

What is the main motivation for early addiction to drugs?

Positive reinforcement Signup and view all the answers