Exploring the Human Brain

What is the average weight of the human brain?

• Around 800 grams (1.8 pounds)

• Approximately 2.5 kilograms (5.5 pounds)

• About 1 kilogram (2.2 pounds)

• Approximately 1.3 to 1.4 kilograms (3 pounds)

What percentage of fat does the human brain comprise?

• 60%

• 40%

• 75%

• 50%

How much power does the human brain generate when awake?

• 20 watts

• 100 watts

• 10 watts

• 50 watts

What portion of the body's blood and oxygen does the brain receive?

• 5% of blood and 30% of oxygen

• 10% of blood and 15% of oxygen

• 25% of blood and 10% of oxygen

• 15-20% of blood and 20% of oxygen

How long does it take for the brain to start losing consciousness after blood supply stops?

• 5 seconds to start losing consciousness, 15 seconds for complete loss.

• 30 seconds to start losing consciousness, 1 minute for complete loss.

• 10 seconds to start losing consciousness, 20 seconds for complete loss.

• 1 minute to start losing consciousness, 2 minutes for complete loss.

For how many minutes can the brain survive without oxygen?

• 1 minute

• 10 minutes

• 30 seconds

• 3 to 5 minutes

What is the total length of blood vessels in the brain?

• 300 to 400 miles

• 800 to 1000 miles

• 400 to 600 miles

• 100 to 200 miles

How many neurons are present in the human brain?

• 70 million

• 100 billion

• 86 billion

• 50 billion

At what rate do neurons develop in early pregnancy?

• About 1,000 neurons per minute.

• Approximately 100,000 neurons per minute.

• Around 500,000 neurons per minute.

• Approximately 250,000 neurons per minute.

What are the three major parts of the brain?

• Thalamus, Hypothalamus, Amygdala

• Cortex, Medulla, Hippocampus

• Frontal Lobe, Occipital Lobe, Temporal Lobe

• Cerebrum, Cerebellum, Brainstem