Health Sci 20 Digestion

Digestion begins here.

• mouth
• stomach
• large intestine
• small intestine

Chewing food with teeth is an example of a

• physical digestion
• chemical digestion

Changes the size, shape, or color of food:

• Physical digestion
• Chemical Digestion

The enzyme "amylase" found in saliva (spit) chemically changes carbohydrates into

• fatty acids
• amino acids
• simple sugars
• proteins

The stomach squeezes and churns (mixes) food, this is a

• Chemical digestion
• Physical digestion

"Peristalsis" is wave-like contractions of smooth muscle along the entire digestive tract from the esophagus to the anus.  This involuntary action squeezes food. Therefore this is an example of

• physical digestion.
• chemical digestion.

The esophagus leads to the

• stomach
• liver
• intestines
• pancreas

During its journey through the digestive tract, at some point food enters the

• liver
• gallbladder
• pancreas
• duodenum

Acids and enzymes are used in 

• physical digestion
• chemical digestion

During chemical digestion 

• only changes in size and shape occur
• a new substance is formed