Human Body Systems Unit Exam

The diagram below represents a portion of the esophagus.

Which is a correct statement about the process shown in the diagram?

• It transports nutrients within the digestive tract.

• It must occur prior to mechanical digestion food in the oral cavity.

• It emulsifies fats for hydrolysis in the small intestine.

• It increases water absorption by the esophagus.

Into which parts of the human digestive system are digestive enzymes secreted?

• mouth, esophagus, stomach

• 
  stomach, small intestine, large intestine

• mouth, stomach, small intestine

• esophagus, stomach, large intestine

What is the role of teeth in digestion?

• 
  They break down food chemically, aiding the movement of the food through the esophagus.

• 
  They break down food chemically, mixing saliva with the food for easier digestion.

• 
  They break down food mechanically, increasing the surface area of the food for enzyme action.

• 
  They break down food mechanically, stimulating enzyme synthesis in the food.

In a human, peristalsis occurs in which organs?

• 
  salivary gland, esophagus, and stomach

• 
  stomach, small intestine, and pancreas

• 
  esophagus, stomach, and small intestine

• esophagus, small intestine, and liver

In humans, villi that absorb monosaccharides and amino acids are found within the

• stomach

• small intestine

• pancreas

• esophagus

Adult humans normally produce feces with low water content due to the activities of the

• large intestine

• small intestine

• stomach

• anus

Emulsification of fats in the small intestines is due to the action of bile, which is released into the intestine from the

• stomach

• gall bladder

• villi

• lacteals

In humans, most of the final phases of chemical digestion and the absorption of nutrients occur in the

• liver

• stomach

• large intestine

• small intestine

Base your answer on the diagram and graph below 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

The diagram below represents the human digestive system.

The organ labeled X functions in the

• 
  production of glycogen and the regulation of blood sugar level

• 
  production of bile and the emulsification of fat

• 
  absorption of food and the hydrolysis of protein

• absorption of water and the formation of feces