Human Digestive System

In a biology lab, a student is studying the digestion process. He observes that proteins are broken down into _______ during digestion.

• Fatty acids

• Glycerol

• Glucose

• Amino acids

Imagine you are a scientist studying the digestion process. When large carbohydrates are broken down during digestion, they are chemically converted into smaller _____ molecules.

• proteins

• amino acids

• glucose

• enzymes

While enjoying a meal at a restaurant, you realize that the process of digestion begins in the ______.

• Mouth

• Stomach

• Small intestine

• Gallbladder

Saliva contains a carbohydrate enzyme called ___.

• Amylase

• Pepsin

• Lipase

• Maltase

The structure that keeps food from entering the trachea is called the _____________.

• Salivary gland

• Epiglottis

• Pharynx

• Esophagus

The chewed up food moves from the mouth to the stomach through the ___________.

• esophagus

• pancreas

• liver

• small intestine

What organ is this?

• stomach
• large intestine
• small intestine
• esophagus

The main function of the stomach is to:

• Store food

• Produce hydrochloric acid

• Begin protein digestion

• All the above

Which enzyme does the stomach produce?

• amylase

• lipase

• maltase

• pepsin

Which of the following kills bacteria in the human digestive system?

• Hydrochloric acid

• Mucus

• Amylase

• Pepsin