Refer to the Graph Below, Showing Changes in the Source

question 171

Multiple Choice

Refer to the graph below, showing changes in the source of blood glucose as a person goes from a state of active food intake to a state of starvation. The person's blood glucose levels remain very stable; only the source of glucose changes.Liver cells play an active role in maintaining the stable levels of blood glucose.Which changes in liver cell metabolism could account for the data shown?

• A) At 1 hour after eating, liver cells inhibit phosphofructokinase and activate enzymes involved in glycogen breakdown.
• B) At 4 hours after eating, liver cells activate enzymes involved in glycogen breakdown as well as enzymes involved in the breakdown of proteins and lipids.
• C) At 10 hours after eating, liver cells activate fatty acid synthase and inhibit enzymes involved in the breakdown of proteins and lipids.
• D) At 2 days into starvation, liver cells activate phosphofructokinase and inhibit enzymes involved in glycogen breakdown.
• E) At 16 days into starvation, liver cells activate phosphofructokinase and inhibit enzymes involved in the breakdown of proteins and lipids.

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Definitions:

J1939 Data Bus

A vehicle bus standard used for communication and diagnostics among vehicle components, primarily in heavy-duty trucks and buses.

Primary Modulation

Term used by Allison to describe the amount of ON time of an actuation signal.

Secondary Modulation

Allison term used to describe the control of current flow to an output device. Also known as submodulation.