Digestion

What is the approximate length of the gastrointestinal tract?

• 5 meters

• 9 meters

• 15 meters

• 20 meters

How much saliva does the human body produce each day?

• 0.5 liters

• 1.0 liters

• 1.5 liters

• 2.0 liters

What is the name for the series of muscular contractions that move food through the esophagus to the stomach?

• Digestion

• Absorption

• Peristalsis

• Mastication

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Into what smaller molecules are fat molecules broken down for easier absorption into the body?

• Amino acids and glucose

• Fatty acids and glycerol

• Carbohydrates and proteins

• Vitamins and minerals