Chapter 23. 23·20–23·22 Drugs can hijack pleasure pathways.

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 23·20–23·22 Drugs can hijack pleasure pathways by answering the following questions.

1.

1. Our nervous system can be tricked with medical or recreational drugs because:

some drugs mimic natural neurotransmitters in the brain.

some drugs block the action of neurotransmitters in the brain.

some drugs allow more sugar and nutrients to enter brain cells, causing feelings of euphoria and happiness.

All of the above are true.

Both A and B are true.

Correct. (See section 23·20 Our nervous system can be tricked by chemicals.)

Incorrect. (See section 23·20 Our nervous system can be tricked by chemicals.)

2.

2. Adenosine receptors can be blocked by what chemical?

ascorbic acid (in orange juice)

caffeine

cocaine

morphine

dopamine

Correct. (See section 23·21 A brain slows down when it needs sleep. Caffeine wakes it up.)

Incorrect. (See section 23·21 A brain slows down when it needs sleep. Caffeine wakes it up.)

3.

3. The ingestion of alcohol:

blocks receptors for glutamate.

stimulates the release of endorphins.

blocks dopamine reuptake.

All of the above are true.

Only A and C are true.

Correct. (See section 23·22 Alcohol interferes with many different neurotransmitters.)

Incorrect. (See section 23·22 Alcohol interferes with many different neurotransmitters.)

4.

4. Which of the following substances blocks neurotransmitter re-uptake at the pre-synaptic membrane?

Prozac

Zoloft

cocaine

All of the above block neurotransmitter re-uptake at the pre-synaptic membrane.

Only A and B block neurotransmitter re-uptake at the pre-synaptic membrane.

Correct. (See section 23·20 Our nervous system can be tricked by chemicals.)

Incorrect. (See section 23·20 Our nervous system can be tricked by chemicals.)

5.

5. Nicotine mimics what type of biological signal molecule?

pheromones

endorphins

serotonin

acetylcholine

opiates

Correct. (See section 23·20 Our nervous system can be tricked by chemicals.)

Incorrect. (See section 23·20 Our nervous system can be tricked by chemicals.)

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