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Increased _____ is a physiological change associated with normal aging.
a. activity of bone-forming cells
b. blood filtration rate
c. heartburn
d. cardiac output

1 Answer

  • The right option is c. heartburn

    Heartburn is a painful burning feeling in the throat or chest. Heartburn is common and it increase in prevalence with age. As people gets older some activity that makes acid indigestion worse occur and can contribute to heartburn. For example the sphincter at the upper part of the stomach, which opens to allow food substances to enter the stomach tends to relax a bit more with age and this allows stomach acid to move slowly  into the esophagus and heartburn can occur.