Why are people over age 40 more likely to use Botox treatments? Is one treatment enough for a lifetime? Explain
What will be an ideal response?
After age 40, the collagen fibers thicken and lose elasticity in the lower layer of the dermis, causing wrinkles and sagging skin. Some wrinkles are caused by contraction of facial muscles. Botox relies on the toxin from the bacterium that causes botulism; this toxin is injected into facial muscles. This toxin temporally paralyzes facial muscles, smoothing out the skin. The effect of the toxin lasts only a few months; therefore, the injection needs to be repeated.
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a. tRNA b. mRNA c. rRNA d. Amino acids
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According to the graph of U.S. municipal solid waste, which type of disposal method emerged in the late 80's?
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