Which is a Change in the Digestive System Associated with Aging

Question

Which is a change in the digestive system associated with aging?
A) Decreased mucin secretion
B) Thinning of the tunica muscularis
C) Decreased enzyme secretion
D) Decreased replacement of epithelial cells
E) All choices are correct

Accepted Answer

All of the choices are correct. As we age, there is a decrease in the secretion of mucin, which can lead to dryness in the digestive tract. The tunica muscularis of the digestive tract also becomes thinner, which can lead to decreased motility and potential problems with constipation. Enzyme secretion also decreases, which can lead to difficulties breaking down food, especially complex carbohydrates. Finally, there is a decrease in the replacement of epithelial cells, which can lead to problems with absorption and potential exposure of the body to harmful substances from the gut.