Human brain contains__________neurons.
Correct answer: C. 100,000,000,000
- A. 10,000,00
- B. 100,000,000
- C. 100,000,000,000
- D. 1000
Explanation
The human brain contains approximately 86 billion neurons, which is commonly rounded in older exam material to about 100,000,000,000 neurons. This is a count of cells, not a percentage or a number of brain regions. Students may choose 100,000,000 because it is a large number, but it is far below the accepted estimate for total human brain neurons.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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