Although hair color and texture are genetically determined, the condition of your hair may also be influenced by hormonal or environmental factors. As pigment production decreases with age the hair color lightens toward gray. White hair results from the presence of air bubbles within the hair shaft. Because the hair itself is quite dead and inert, changes in coloration are gradual. Unless bleach
is used, it is not possible for hair to "turn white overnight," as some horror stories would have us believe.
a. The hair itself is dead and inert so any real change in the hair must be produced by using artificial chemicals.
b. Although white hair is the result of air bubbles within the hair shaft, the hair can turn white overnight.
c. Hair color and texture are genetically determined but other conditions of the hair are influenced by hormonal or environmental factors.
d. Hair turns gray because the pigment production decreases with age.
c
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Use the verb in the list to complete the sentence below
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a. true b. false