LIFESCI 15 Lecture Notes - Lecture 11: Taste Bud, Sugar Substitute, Phenylalanine
Document Summary
Kilocalorie = 1000 calories (energy required to raise 1g h2o by 1 degree celcius = 1 calorie) Energy needed to maintain life without activity. Mouth: 2 functions: mash up food, partially digest starch. Stomach: 3 functions: more food smashing, start protein digestion (hcl, pepsin, secrete acid: denature protein, kill bacteria. Small intestine: 4 functions: neutralizes chyme ph (with bicarbonates, finish protein/starch digestion, emulsify & digest lipids (bile, absorb nutrients & h2o. Large intestine: 3 functions: absorb h2o, push chyme into rectum for excretion, absorb nutrients produced by bacteria. Antacids are basic which neutralizes the acid in your stomach. A: artificial sweetener = two amino acids put together. The shape of those two molecules (aspartic acid and phenylalanine) together fits on a taste bud on your tongue for sugar. Get it with a small amount of sweetener so on the can it says 0 calorie.
