Human Digestive System - Practice

Proteins are broken down into _______.

• Fatty acids

• Glycerol

• Glucose

• Amino acids

Large carbohydrates are chemically digested into smaller _____ molecules

• proteins

• amino acids

• glucose

• enzymes

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

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

Where does protein digestion begin?

• mouth

• stomach

• small intestine

• large intestine