Objective 5:
1. The two parts of digestion are mechanical and chemical.
2. Mechanical digestion requires "manual" labor, like by chewing. Chemical digestion is when there is hydrochloric acid in your stomach and small intestine.
3. Well, if someone can't chew their own food, then their body can't preform mechanical digestion, so their body has to preform a lot more chemical digestion, which could maybe be overworked.
4. The pH in your mouth is 7. The pH in your stomach is 1.5 . The pH in your small intestine is 8.
5. Different enzymes work better with different pH values, and enzymes evolved in digestion can effect reactions within and outside of cells.
Cites:
www.mnsu.edu/emuseum/biology/.../digestive/index.shtml
http://wiki.answers.com/Q/What_is_the_difference_between_mechanical_digestion_and_chemical_digestion#ixzz16btmgJUm
http://wiki.answers.com/Q/What_is_the_ph_in_your_mouth
http://wiki.answers.com/Q/What_is_the_pH_of_the_stomach
http://wiki.answers.com/Q/What_is_the_ph_of_your_small_intestine
http://wiki.answers.com/Q/How_is_pH_important_during_digestion
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