Question 1

Which is adenosine?
A)a neurotransmitter stimulated by caffeine
B)an inhibitory neurotransmitter
C)a component of some bronchial dilators
D)a breakdown product from caffeine metabolism

Accepted Answer

Adenosine is an inhibitory neurotransmitter that promotes sleep and relaxation by slowing down nerve activity.

Question 2

Which organ does most of the metabolizing of caffeine?
A)pancreas
B)liver
C)kidneys
D)colon

Accepted Answer

The liver is the primary site for metabolism of caffeine. It is metabolized by cytochrome P450 enzymes in the liver to form paraxanthine, theobromine, and theophylline, which are then eliminated from the body through urine.

Question 3

What is caffeine's primary action?
A)contraction of the heart
B)stimulation of CNS activity
C)elevation of basal metabolism
D)stimulating effect on respiration

Accepted Answer

Caffeine's primary action is to stimulate CNS activity, which can increase alertness, focus, and energy levels. It does not directly affect heart contraction, basal metabolism, or respiration.

Question 4

How is caffeine mainly excreted from the body?
A)in the feces
B)in saliva
C)by the kidneys
D)through sweat

Accepted Answer

Caffeine is mainly excreted from the body by the kidneys, which filter it from the blood and excrete it in urine. Some small amounts of caffeine can also be excreted in feces and sweat, but the majority is eliminated through the urine. Saliva does not play a significant role in caffeine excretion.

Question 5

What percentage of the world's population is estimated to regularly consume products containing caffeine?
A)20%
B)50%
C)75%
D)90%

Accepted Answer

Caffeine is a widely consumed substance, found not only in coffee and tea but also in soda, energy drinks, chocolate, and some medications. According to a report by the International Coffee Organization, it is estimated that 90% of the world's population regularly consumes products containing caffeine. This makes it one of the most commonly used psychoactive substances in the world.

Question 6

What type of inhibitor is caffeine,according to the text?
A)theophylline
B)acetylcholine
C)serotonin
D)adenosine

Accepted Answer

Caffeine is an adenosine receptor antagonist, meaning it blocks the action of adenosine. Therefore, it acts as an inhibitor of adenosine.

Question 7

After taking a dose of caffeine,when do peak levels of caffeine in the blood occur?
A)1-2 minutes
B)5-10 minutes
C)15-45 minutes
D)1-2 hours

Accepted Answer

After taking a dose of caffeine, peak levels of caffeine in the blood occur around 15-45 minutes.

Question 8

What does adenosine produce?
A)lowered heart rate
B)increased alertness
C)dilation of bronchial passageways
D)increased bodily reaction to stress

Accepted Answer

The answer of What does adenosine produce?
A)lowered heart rate
B)increased alertness
C)dilation...

Question 9

What is the most consistently reported symptom of withdrawal from caffeine?
A)headaches
B)depression
C)sleepiness
D)irritability

Accepted Answer

Headaches are the most consistently reported symptom of withdrawal from caffeine.

Question 10

What is the range of the half-life of caffeine in the blood?
A)30-45 minutes
B)1-2 hours
C)12-20.5 hours
D)21.5-71.5 hours

Accepted Answer

The answer of What is the range of the half-life...

Question 11

What will most smokers do after drinking coffee?
A)smoke more cigarettes
B)smoke fewer cigarettes
C)smoke the same number of cigarettes
D)smoke more and have another coffee

Accepted Answer

Research has shown that nicotine has a stimulating effect on the brain and can enhance the pleasurable effects of caffeine. Therefore, many smokers tend to smoke more cigarettes after drinking coffee. However, if a smoker is actively trying to quit smoking, they may choose to smoke fewer cigarettes or try to avoid smoking altogether after drinking coffee.

Question 12

According to the study conducted by Marks & Kelly (1973),which drink is most likely to continue to be close to its peak level of caffeine in the blood,two hours after consumption?
A)cola
B)coffee
C)tea
D)maté

Accepted Answer

Cola contains caffeine, which has a half-life of about 5 hours. This means that two hours after consumption, about 75% of the caffeine will still be in the blood.

Question 13

What slows the process of caffeine metabolism and excretion?
A)cigarette smoking at any age
B)establishing a regular 40-50 minute cardio workout each day
C)pregnancy
D)age;an adolescent's process is the slowest

Accepted Answer

Pregnancy slows down caffeine metabolism and excretion due to the hormonal changes and changes in liver function during pregnancy.

Question 14

About how long does withdrawal from caffeine last?
A)one day
B)two to three days
C)one week
D)two to three weeks

Accepted Answer

The answer of About how long does withdrawal from caffeine...

Question 15

After consumption,where is the concentration of caffeine the highest?
A)It is highest in the liver.
B)It is highest in the kidneys.
C)It is highest in the brain.
D)It is similar throughout the body.

Accepted Answer

Caffeine is a small, water-soluble molecule that easily crosses the blood-brain barrier, but it is distributed evenly throughout the body's water compartments after consumption. This means its concentration does not specifically peak in organs like the liver, kidneys, or brain, but rather is similar throughout the body.

Question 16

As you meet your new university roommate,she informs you that she is from the place in the world which is the world's primary producer of cocoa.What continent is she from?
A)South America
B)Africa
C)North America
D)Europe

Accepted Answer

Africa is the primary producer of cocoa in the world, with countries such as Ivory Coast, Ghana, and Nigeria being among the top cocoa-producing nations. Both South America and North America produce cocoa as well, but they are not the primary producers. Europe does not produce cocoa, but they are a major consumer and processor of cocoa beans.

Question 17

Where can tolerance to caffeine generally be observed?
A)EEG changes
B)cardiovascular changes
C)cancerous tumors
D)lower sperm count

Accepted Answer

Tolerance to caffeine is generally observed in cardiovascular changes, such as increased heart rate and blood pressure, as the body adapts to regular caffeine consumption.

Question 18

How does caffeine affect the rapidity and accuracy of motor skills?
A)increases them
B)decreases them
C)it depends on the dosage
D)there is no effect

Accepted Answer

Caffeine's effect on the rapidity and accuracy of motor skills can vary depending on the dosage. Low to moderate doses may improve reaction time and accuracy, while high doses can lead to jitteriness and decrease performance.

Question 19

Josh has been drinking heavily at the bar and is drunk.Before going home,his friends give him a big cup of strong black coffee.What can Josh expect after drinking the coffee?
A)to perform decision-making tasks effectively
B)the effects of alcohol to possibly worsen
C)to get sober faster
D)to have increased motor coordination

Accepted Answer

Coffee does not sober you up or reduce the effects of alcohol; it can make you more alert but does not reverse the impairment of motor skills or decision-making abilities caused by alcohol.

Question 20

What were the results of Lowe's 1988 study on the effects of the combination of alcohol and caffeine on state-dependent learning?
A)Alcohol was mostly responsible for the state-dependence effect.
B)Caffeine was mostly responsible for the state-dependence effect.
C)Alcohol and caffeine had an equal effect.
D)There was no effect on learning.

Accepted Answer

The answer of What were the results of Lowe's 1988...

Quiz 8: Caffeine

Which is adenosine?

Which organ does most of the metabolizing of caffeine?

What is caffeine's primary action?

How is caffeine mainly excreted from the body?

What percentage of the world's population is estimated to regularly consume products containing caffeine?

What type of inhibitor is caffeine,according to the text?

After taking a dose of caffeine,when do peak levels of caffeine in the blood occur?

What does adenosine produce?

What is the most consistently reported symptom of withdrawal from caffeine?

What is the range of the half-life of caffeine in the blood?

What will most smokers do after drinking coffee?

According to the study conducted by Marks & Kelly (1973) ,which drink is most likely to continue to be close to its peak level of caffeine in the blood,two hours after consumption?

What slows the process of caffeine metabolism and excretion?

About how long does withdrawal from caffeine last?

After consumption,where is the concentration of caffeine the highest?

As you meet your new university roommate,she informs you that she is from the place in the world which is the world's primary producer of cocoa.What continent is she from?

Where can tolerance to caffeine generally be observed?

How does caffeine affect the rapidity and accuracy of motor skills?

Josh has been drinking heavily at the bar and is drunk.Before going home,his friends give him a big cup of strong black coffee.What can Josh expect after drinking the coffee?

What were the results of Lowe's 1988 study on the effects of the combination of alcohol and caffeine on state-dependent learning?