Question 1

Which of the following statements best explains why nicotine reaches the brain so quickly when smoked in a cigarette?

Accepted Answer

Nicotine is absorbed through the lungs, which provide a large surface area and rapid access to the arterial blood supply leading directly to the brain.

Question 2

Which of the following is NOT a physiological effect of nicotine on the body?

Accepted Answer

Decreased secretion of stomach acid and ulcer formation

Question 3

A patient presents with symptoms of nicotine poisoning after accidental ingestion of insecticide. Which mechanism is most likely responsible for the toxicity?

Accepted Answer

Depolarization block of the breathing muscles due to overstimulation of nicotinic receptors

Question 4

Which of the following statements about nicotine self-administration is correct?

Accepted Answer

It depends on the α4 subunit of the nicotinic receptor.

Question 5

Which of the following is NOT a benefit of nicotine gum as a smoking cessation aid?

Accepted Answer

Lack of side effects

Question 6

A researcher is studying the reinforcing effects of smoking in adults. Which neurotransmitter pathway is most directly involved?

Accepted Answer

Dopamine pathway to the nucleus accumbens

Question 7

Which toxic substance is NOT produced or released during the smoking of tobacco?

Accepted Answer

Mecamylamine

Question 8

Which statement about quitting smoking is TRUE?

Accepted Answer

Relatively few (\u003c10%) smokers attempt to quit each year.

Question 9

Which formulation has NOT been used in nicotine replacement therapy?

Accepted Answer

Pill

Question 10

Which of the following statements about caffeine is FALSE?

Accepted Answer

About 50% of adults consume caffeinated beverages.

Question 11

Which of the following is NOT a characteristic of caffeine intoxication?

Accepted Answer

Drowsiness

Question 12

Caffeine withdrawal is characterized by all of the following EXCEPT:

Accepted Answer

Increased appetite

Question 13

Which statement about adenosine is FALSE?

Accepted Answer

It is released by caffeine.

Question 14

Caffeine’s antagonism of both $$A_1$$ and $$A_2A$$ receptors, especially in the striatum, is important in the arousing and activating effects of the drug. What is the main effect of this antagonism?

Accepted Answer

Increased dopamine release and enhanced alertness

Question 15

In laboratory animals, the effect of increasing doses of caffeine causes:

Accepted Answer

Increased activity, followed by decreased activity

Question 16

Which of the following is a potentially dangerous effect of combining energy drinks and alcohol?

Accepted Answer

Alcohol-related impairment is still present although the individual may feel less intoxicated

Question 17

Which statement about people who are tolerant and/or dependent on caffeine in coffee is FALSE?

Accepted Answer

They are considered addicted to caffeine.

Question 18

Which of the following best describes the biphasic effect of caffeine overdose?

Accepted Answer

Low doses cause increased motor activity, high doses cause decreased activity

Question 19

Which of the following is NOT a reason adolescents smoke, according to researchers?

Accepted Answer

To delay restlessness

Question 20

Which of the following statements about the metabolism of nicotine is FALSE?

Accepted Answer

Nicotine metabolism is slower in smokers than in non-smokers.

Nicotine and Caffeine: Biochemical and Physiological Effects

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