An individual develops intellectual disability because of a disorder called phenylketonuria. Which of the following occurrences is a cause of the intellectual disability in the individual?
A) The replacement of myelin by hard, fibrous tissue in the individual's neurons
B) The inhibition of normal myelin development in the individual's brain
C) Insulation of the neurons by myelin
D) Myelination of the prefrontal matter of the individual's brain
Question 2
Toward the end of early adulthood, and almost certainly in middle adulthood, the skin begins to tighten and grow more elastic, more so in women than in men.
Indicate whether the statement is true or false
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