The Machinery of a Meal: teacher key

Healthy Eating, grade 11 edition, written for 11th grade. Trace a meal through the organs that break it down, and see what energy, fibre, protein, vitamins and minerals do along the way.

Read the book. Print this page for the key.

Questions and answers

1. What does the liver make?
   • Chyme
   • Bile (answer)
   • Saliva
2. What does the pylorus do?
   • It keeps chyme in the stomach until it is the right consistency (answer)
   • It makes bile
   • It pushes food down the esophagus
3. Why does fibre add bulk to stool?
   • Some fibre travels through the body intact (answer)
   • Fibre is broken into glucose
   • Fibre makes bile
4. What do sugars and most starches become so the body can use them as energy?
   • Chyme
   • Glucose (answer)
   • Bile
5. Which vitamin do bacteria in the large intestine help make?
   • Vitamin D
   • Vitamin C
   • Vitamin K (answer)
6. What does the word enzymes mean here?
   • Helpers in juices that break down food (answer)
   • Parts of a grain kernel
   • Minerals from soil

Words

• chyme: thick stomach liquid
• bile: fat-digesting juice
• glucose: blood sugar
• enzymes: digestive helpers
• fibre: plant food part