The graph below shows the relative changes in concentration of glucose, fatty acids, and ketone bodies during 40 days of starvation. Choose the answer that correctly labels the data on the graph.
A) X = fatty acids; Y = glucose; Z = ketone bodies
B) X = glucose; Y = fatty acids; Z = ketone bodies
C) X = ketone bodies; Y = glucose; Z = fatty acids
D) X = ketone bodies; Y = fatty acids; Z = glucose

Question

The graph below shows the relative changes in concentration of glucose, fatty acids, and ketone bodies during 40 days of starvation. Choose the answer that correctly labels the data on the graph. 
A) X = fatty acids; Y = glucose; Z = ketone bodies 
B) X = glucose; Y = fatty acids; Z = ketone bodies 
C) X = ketone bodies; Y = glucose; Z = fatty acids 
D) X = ketone bodies; Y = fatty acids; Z = glucose

Quizplus · Accepted Answer

As the duration of starvation increases, there is a significant increase in the relative concentration of ketone bodies (labeled X) in the blood, while the concentration of glucose (labeled Y) steadily decreases. The relative concentration of fatty acids (labeled Z) remains relatively constant throughout the 40 days of starvation. Thus, the correct labeling of the data on the graph is X = ketone bodies; Y = glucose; Z = fatty acids, choice C.

The Graph Below Shows the Relative Changes in Concentration of Glucose