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.
You might also like to view...
Staphylococci can be divided into pathogenic and relatively nonpathogenic strains based on whether or not they synthesize ________.
A. coagulase B. a capsule C. leukocidins D. catalase
What are small projections of the mucosal wall composed of brush border cells?
a. microvilli b. mucins c. villi d. submucosa e. jejunum
__________ are cells that synthesize bone, whereas __________ break bone down. Fill in the blank(s) with the appropriate word(s)
Predict what would happen if the pulmonary vein returned blood to the right atrium.
A. Abnormally high levels of oxygenated blood would be pushed into the systemic circuit. B. Oxygenated blood would be kept in a circular path between the heart and lungs-it would not reach the systemic circuit. C. Abnormally high levels of deoxygenated blood would be pushed into the systemic circuit. D. The expected cardiac cycle would occur-this is the normal path.