Understanding Caffeine: A Comprehensive Quiz

What is the primary effect of caffeine on the human body?

• It slows down the central nervous system.

• It speeds up the central nervous system.

• It has no significant effect on the central nervous system.

• It only affects the digestive system.

How much caffeine is generally considered safe for most adults per day?

• Up to 50 mg

• Up to 200 mg

• Up to 400 mg

• More than 500 mg

Which of the following is NOT a common source of caffeine?

• Tea

• Chocolate

• Bananas

• Coffee

What can be a potential short-term effect of consuming caffeine?

• Decreased alertness

• Increased heart rate

• Lower blood pressure

• Slower breathing rate

What is the recommended maximum caffeine intake for adolescents according to most health guidelines?

• 100 mg per day

• 200 mg per day

• 300 mg per day

• 400 mg per day

Which of the following conditions can be made worse by excessive caffeine consumption?

• Asthma

• Insomnia

• Hypothyroidism

• Hypotension

Caffeine withdrawal can cause which of the following symptoms?

• Increased energy

• Headache

• Lower heart rate

• Improved concentration

How long does it typically take for caffeine to reach its peak level in the blood after consumption?

• 15-30 minutes

• 30-60 minutes

• 1-2 hours

• 2-4 hours

Which of the following is a long-term health risk associated with excessive caffeine consumption?

• Decreased bone density

• Increased liver function

• Lowered cholesterol levels

• Enhanced immune system

Caffeine can be found naturally in which of the following plants?

• Wheat

• Coffee beans

• Rice

• Lettuce