Approximately how many neurons are found in the average adult human brain?

• A. About 86 billion
• B. About 10 million
• C. About 100 thousand
• D. About 1 trillion

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the context of the question. Neurons are specialized cells in the nervous system responsible for transmitting information throughout the body. The human brain contains a vast number of neurons, which are crucial for its complex functions.
2. Step 2: Recall the approximate number of neurons in the average adult human brain. Scientific studies estimate this number to be around 86 billion neurons, based on advanced imaging and counting techniques.
3. Step 3: Compare the given options to the scientific estimate. The options provided are: About 86 billion, About 10 million, About 100 thousand, and About 1 trillion.
4. Step 4: Eliminate options that are significantly different from the scientific estimate. For example, 10 million and 100 thousand are far too low, while 1 trillion is excessively high compared to the known estimate of 86 billion.
5. Step 5: Select the option that aligns with the scientific estimate. Based on the comparison, the correct answer is 'About 86 billion,' as it matches the approximate number of neurons found in the average adult human brain.