Digestive System

The diagram below represents a process that occurs in human systems.

This process is known as

• excretion

• respiration

• circulation

• digestion

Before starch can enter a cell, it must be

• absorbed by simple sugars

• diffused into simple sugars

• digested to form simple sugars

• actively transported by simple sugars

The pancreas, an organ which secretes enzymes directly into the intestine, helps

• break down food in the intestine

• prevent food from being digested in the intestine

• degrade the intestine

• preserve the structure of the intestine

All of the following are organs of the digestive system except

• the stomach

• the mouth

• the intestines

• the heart

Enzymes and acidic juices in the stomach, which break proteins down into smaller molecules, is known as

• circulation

• chemical digestion

• excretion

• mechanical digestion

Teeth chewing food into smaller digestible pieces is known as

• chemical digestion

• circulation

• mechanical digestion

• regulation

The digestion of starch begins in the

• mouth

• stomach

• gallbladder

• small intestine

The diagram above represents a portion of the human body.

The principal function of structure X is to

• produce salivary enzymes

• secrete sex hormones

• absorb water

• digest bile

Base your answer on the diagram and graph above and on your knowledge of biology. The diagram represents the human digestive system. Pepsin and trypsin are human digestive enzymes.

The graph indicates that PEPSIN would function best in the

• mouth

• stomach

• small intestine

• large intestine

Which structures secrete chemicals utilized for the completion of digestion within the small intestine?

• liver and pancreas

• glomerulus and villi

• esophagus and alveoli

• gallbladder and pharynx