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Essay Quiz
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1.
Describe a neuron including all of its parts. Explain how myelination affects neurons.
2.
What is the difference between life span and life expectancy? Estimate your own life expectancy based on the most important factors in longevity.
3.
Discuss the cellular clock, free-radical, mitochondrial, and hormonal stress theories of aging. In your opinion, which of these biological theories best explains aging?





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