What percentage of the human brain is water?
50%
75%
70%
80%
Which part of the brain controls balance and coordination?
Cerebrum
Cerebellum
Brainstem
Hippocampus
How many neurons does the average human brain have?
100 million
1 billion
86 billion
100 billion
Which part of the brain is primarily responsible for memory formation?
Amygdala
Hippocampus
Thalamus
Medulla
The brain uses what percentage of the body’s energy?
5%
10%
20%
30%
Which brain region regulates emotions and fear responses?
Hippocampus
Amygdala
Corpus callosum
Cerebellum
Which lobe of the brain is responsible for reasoning and decision-making?
Occipital
Parietal
Frontal
Temporal
What is the function of glial cells?
Transmit signals
Support and protect neurons
Digest nutrients
Store memories
Which phenomenon shows that the brain can rewire itself after injury?
Neurogenesis
Neuroplasticity
Apoptosis
Synesthesia
. Which chemical in the brain is primarily linked to pleasure and reward?
Serotonin
Dopamine
GABA
Acetylcholine
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