1. Digestive System Jeopardy

2. 10 pts: Where does digestion start? Mouth BONUS 10 pts: Name 2 things in the mouth that help break down food Teeth, tongue, saliva

3. esophagus 10 pts: What organ takes food from the mouth to the stomach? Bonus 10 pts: What is the flap called that covers the glottis? Epiglottis Esophagus made of smooth muscle Contractions called peristalsis move food down throat

4. Stomach 10 pts: What organ comes after the esophagus in digestion? Bonus 10 pts: Sometimes acid can go back up the esophagus, which causes this condition… Heart burn, or acid reflux Ring of muscle between esophagus and stomach allows food to pass through, called the esophageal sphincter

5. 20 pts: What in the stomach helps digest food? Stomach acid Bonus 20 pts: What is the pH of stomach acid? About pH 1 (Battery acid is pH 0, and Cola is 2.5)

6. 20 pts: Why doesn’t stomach acid eat through the lining of the stomach? Stomach secretes mucus to protect the lining of the stomach Bonus 20 pts: What occurs if the mucus of the stomach lining wears away? Stomach ulcer

7. 20 pts: Besides stomach acid, how else is food digested in the stomach? Stomach also churns food using muscle contractions Bonus 20 pts: About how many hours does food spend in the stomach? About 2 – 4 hours

8. 30 pts: What is the next digestive organ after the stomach? Small intestine Pyloric sphincter lets food from stomach to the small intestine Made of thick ring of muscle

9. 30 pts: What is the main role of the small intestine? Absorbing nutrients Villi are small finger-like projections in the small intestine that absorb nutrients Food spends about 3-5 hrs in the small intestine

10. 30 pts: Bile is the enzyme that is made by this organ, which aids in digestion. Liver

11. 40 pts: In which organ is bile stored? Gallbladder

12. 40 pts: Where is the gallbladder located? Underneath the liver – connects the liver to the small intestine

13. 40 pts: What other organ, which is found near the stomach, secretes enzymes for digestion? Pancreas

14. 50 pts: What is the main job of the large intestine? Absorbs water Between the small and large intestine is a small pouch In humans – the appendix (function unknown) In other mammals – the cecum (function to break down cellulose

15. 50 pts: Where does undigested food go after leaving the large intestine? Rectum Undigested food can stay in the large intestine for 10 hours to several days

16. 50 pts: Where does food go after leaving the rectum? Through the anus into the toilet

17. Next 3 questions are open to all teams – each worth 20 pts 1. This condition occurs when the large intestine doesn’t absorb enough water Diarrhea 2. This condition occurs when too much water is absorbed Constipation 3. Approximately how long in meters is the digestive tract from beginning to end, for the average adult human? (Closest team wins) 9 meters

18. Final Jeopardy – make your wager! Food is processed in 4 phases: ingestion, digestion, absorption, and elimination. Name one organ that is involved in EACH of these phases Ingestion – mouth Digestion – stomach Absorption – small or large intestine Elimination – rectum or anus