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Home Q & A Board Biology-Related Homework Help General Biology
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vr vr
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6 years ago
Blood vessels show which sign of aging?
  a. Elastin fibers in their walls are replaced by collagen or calcium deposits.
  b. The muscles become softer and expand more easily.
  c. The smooth muscle layer constricts more readily.
  d. Elastin fibers double in quantity.
  e. The veins develop more valves.

Question 2

All of the following are usually a part of the aging of reproductive systems EXCEPT ____.
  a. declining levels of estrogen
  b. menopause
  c. loss of sexual response
  d. decreased fertility
  e. declining testosterone levels
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ShathenaShathena
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