1. a substance that in the chemical digestion of food
a. epiglottis
b. enzyme
c. gallbladder
d. peristalsis

2. a small flap of tissue that closes the windpipe when you swallow food to keep you from choking
a. epiglottis
b. enzyme
c. gallbladder
d. peristalsis

3. which of the following organs is where most nutrients are absorbed
a. large intestine
b. esophagus
c. small intestine
d. stomach

4. the kidneys contains millions of tiny filtering units called
a. urine
b. villi
c. peristalsis
d. nephrons

5. the kidneys have the important job of
a. reabsorbing water into bloodstream
b. filtering the blood to remove wastes
c. breaking down food mechanically
d. producing bile to digest fats

6. proteins are made of substances called
a. amino acids
b. sugars
c. carbohydrates
d. starches

7. according to the chart recommended serving per day for 16-year olds which food group do teenagers need the least? hint: 8 ounces=1 cup
a. protein
b. dairy
c. vegetables
d. grains