Question 1

Which is an example of a carcinogen found in tobacco?

Accepted Answer

Nitrosamines are carcinogens found in tobacco. They are formed during the curing and processing of tobacco and are known to contribute to the development of cancer in humans.

Question 2

Dan, who has smoked for years, recently quit smoking and is experiencing withdrawal symptoms referred to as ____ syndrome.

Accepted Answer

The answer of Dan, who has smoked for years, recently...

Question 3

Which biological effect is most likely to occur in a nonsmoker following a cigarette?

Accepted Answer

Nausea is a common symptom of nicotine poisoning, which can occur in nonsmokers who are exposed to secondhand smoke or who ingest nicotine in other ways.

Question 4

Nicotine produces effects on motor stability. These changes are particularly noticeable in the ____.

Accepted Answer

Nicotine can affect motor stability, and these effects are particularly noticeable in the hands, often causing tremors or shakes.

Question 5

Nicotine produces widespread physiological effects. The two most notable are on the ____.

Accepted Answer

The answer of Nicotine produces widespread physiological effects. The two...

Question 6

Beyond nicotine, other compounds in tobacco may act in the nervous system, possibly enhancing nicotine's effects (Khalil, Steyn, & Castagnoli, 1999). In particular, many chemicals in tobacco ____ activity.

Accepted Answer

Many chemicals in tobacco inhibit monoamine oxidase (MAO), an enzyme responsible for breaking down neurotransmitters such as dopamine, thus potentially enhancing nicotine's effects on the nervous system.

Question 7

The activation of nicotinic receptors in either the ventral tegmental area or the nucleus accumbens increases ____ release in the nucleus accumbens.

Accepted Answer

The activation of nicotinic receptors in either the ventral tegmental area or the nucleus accumbens increases dopamine release in the nucleus accumbens, which is a key mechanism in the reward pathway of the brain.

Question 8

What is the function of the activation of nicotinic receptors in the peripheral nervous system?

Accepted Answer

Nicotinic receptors, when activated in the peripheral nervous system, primarily affect skeletal muscle cells, leading to muscle contraction.

Question 9

Many of the severely adverse effects associated with nicotine are the result of its ____.

Accepted Answer

The severely adverse effects of nicotine are primarily due to its delivery through tobacco products, which contain numerous harmful chemicals and carcinogens.

Question 10

Eva suffers from a type of chronic obstructive pulmonary disorder caused by irreversible lung damage. What condition does Eva suffer from?

Accepted Answer

Emphysema is a type of chronic obstructive pulmonary disease (COPD) characterized by irreversible damage to the lungs, leading to difficulty breathing.

Question 11

An indirect or atypical means of inhibiting a receptor's activity, such as when the net effects of a receptor agonist consists of a longer inactivated receptor state and a shorter activated receptor state is referred to as ____.

Accepted Answer

The answer of An indirect or atypical means of inhibiting...

Question 12

The release and inhalation of which product from smoked tobacco provides direct contact of carcinogens with tissue in the mouth, throat, esophagus, and lungs?

Accepted Answer

Tar is the primary component in tobacco smoke that provides direct contact of carcinogens with tissues in the mouth, throat, esophagus, and lungs. It is a sticky substance that forms when tobacco is burned and contains many cancer-causing chemicals.

Question 13

Why do the effects of nicotine in a first-time smoker differ greatly from the effects of nicotine in a longtime smoker?

Accepted Answer

Longtime smokers develop tolerance to nicotine, leading to an increase in nicotine receptor levels as the body tries to maintain normal function despite the presence of nicotine.

Question 14

Acute tolerance to nicotine's effects on heart rate and blood pressure happens when nicotine is administered ____.

Accepted Answer

Acute tolerance to nicotine's effects on heart rate and blood pressure occurs when nicotine is administered soon after the previous dose, as the body quickly adapts to its presence, reducing the physiological response to subsequent doses.

Question 15

A conditioned taste aversion is the result of a pairing process between a ____.

Accepted Answer

A conditioned taste aversion occurs when a novel-tasting substance (something new or not regularly consumed) is paired with a noxious stimulus (something that causes discomfort or illness), leading to an aversion to that substance in the future.

Question 16

Deandra researches the effects of nicotine on the body for a term paper. She is surprised to find out that nicotine has some beneficial effects, including improving ____ functioning.

Accepted Answer

Nicotine has been found to have some cognitive-enhancing effects, such as improving attention, memory, and concentration.

Question 17

Who is demonstrating a typical pattern of tolerance to tobacco?

Accepted Answer

Tolerance to a substance like tobacco means that over time, the body's response to the substance diminishes, requiring more of the substance to achieve the same effect. Sarah's experience, where her heart races less with subsequent cigarettes throughout the day, demonstrates this pattern of tolerance.

Question 18

Will has smoked a pack of cigarettes a day for years, greatly increasing his risk of stroke. What is the link between cigarette smoking and stroke?

Accepted Answer

Cigarette smoking constricts blood vessels, which can lead to increased blood pressure and a higher risk of stroke due to reduced blood flow and potential blockages in the arteries.

Question 19

Researchers use which technique to directly measure neurotransmitter levels in the brain?

Accepted Answer

Microdialysis is a technique used to measure the concentration of neurotransmitters in the extracellular fluid of the brain by sampling the interstitial fluid. This method allows researchers to monitor neurotransmitter levels in vivo, providing direct measurements of chemical activity in the brain.

Question 20

How does the brain compensate for the repeated closing of nicotinic-receptor channels caused by nicotine binding?

Accepted Answer

The brain compensates for the repeated closing of nicotinic-receptor channels caused by nicotine binding by upregulating nicotinic receptors. This is a compensatory mechanism to counteract the desensitization of receptors due to continuous exposure to nicotine.

Quiz 7: Nicotine and Caffeine