Science+page+71

Angela Corrao Science page 271 questions 1-15, 17-18 1. Urine travels from each kidney to the urinary bladder through the **urete**. 2. The rhythmic contractions that occur in the digestive tract are called **peristalsis**. 3. The chemical digestion of carbohydrates beings in the **mouth**. 4. Bile is made in the **liver** and stored in the **gallbladder**. 5. **Excretion** is the process of removing wastes and waste products from the body. This term is only used when substances are passed through a membrane before leaving the body. 6. Indigestible material is formed into feces in the **large** **intestine**. 7. ADH 8. Liver **(wrong)** 9. Atrery 10. Villi 11. Pancreas 12. Chyme

13. The reason that it is important that the pancreas releases bicarbonate into the small intestine because without the bicarbonate acids would damage the lining of the intestine. Without the bicarbonate it would prevent the enzymes from doing their work. 14. The inside wall of the small intestine is covered with projections called villi, which are covered with small nutrient absorbing cells. Since the villi extends into the chyme, the cells have greater exposure to nutrients. One it is absorbed, the nutrients enters the bloodstream. 15. Diuretics is something that causes the kidneys to make more urine, which then decreases the amount of water in the blood. 17. If your liver was damaged it would affect the process of digestion because no nutrients would be able to be stored, there would be no bile being made which would cause the fat in foods not to be digested. The toxic substances in your blood would be able to be broken down, and your cell membranes would receive no cholesterol because your liver would not be able to make it. 18. Then you put a piece of carbohydrate-dense food, in your mouth at the tip of your tongue it starts to taste like sugar. The reason for this is because when you chew your food gets mixed in with a fluid called saliva, which contains an enzyme that begins the chemical digestion of carbohydrates. Saliva then turns carbohydrates into a simple sugar.