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11 Cards in this Set
- Front
- Back
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What is the caffeine content of the following beverages?
1. Colas 2. Tea 3. Coffee 4. Hot chocolate |
1. Colas: 32-70 mg per 12-oz can (355 ml) 2. Tea: 32-42 mg per teacup (150 ml) 3. Coffee: 71-220 mg per teacup (150 ml) 4. Cocoa: 4 mg per teacup (150 mL) |
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Name the 2 major coffee types and their caffeine content per cup (150 mL) |
1. Arabica: 71-120 mg 2. Robusta: 131-220 mg |
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Caffeine is related structurally to which body chemical? |
Uric acid |
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1. What is the half-life in plasma of caffeine? 2. Name two situations that can increase these numbers two-fold. |
1. Half life caffeine: 3-7 hours 2. This can increase twofold with women in later stages of pregnancy on on long-term oral contraceptives. |
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Name 3 basic intracellular actions related to the effects of caffeine and other methylxanthines. |
1. Translocations of intracellular calcium 2. Increasing accumulation of cyclic nucleotides 3. Adenosine receptor blockade |
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Name 3 positive behavioral effects occurring after the consumption of a cup (155 ml) of coffee. |
1. Increased alertness 2. Increased energy 3. Increased ability to concentrate |
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What is a "low" or "moderate" dose of caffeine, usually contained in 1 wimpy cup of coffee? |
50-300 mg |
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Name 4 negative effects of caffeine related to doses above 300 mg. |
1. Anxiety 2. Restlessness 3. Insomnia 4. Tachycardia |
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Name 9 commonly reported symptoms of caffeine withdrawal |
1. Headache 2. Fatigue 3. Drowsiness 4. Impaired concentration 5. Depression 6. Anxiety 7. Increased muscle tension 8. Tremor ("Java-jitters") 9. Nausea, vomiting |
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How long after sudden cessation of caffeine consumption can withdrawal symptoms appear? At what time might they peak? |
12-24 hours, peak about 20-48 hours, BUT THERE CAN BE EXCEPTIONS. |
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Re tolerance to caffeine:
1. Physiological effects
2.Tension and anxiety
3. Strength of behavioral effects |
1. Tolerance to effects of caffeine on BP, HR, diuresis, plasma adrenaline and noradrenaline levels usually develops in a few days.
2. Tension and anxiety: little known.
3. Tolerance regarding caffeine-induced wakefulness and alertness not studied. |
