The Ratio of NADP⁺/NADPH in Liver Runs About 1/67

question 28

Multiple Choice

The ratio of NADP⁺/NADPH in liver runs about 1/67.What does this mean?

• A)Glucose-6-phosphate dehydrogenase activity is dependent upon use of some of the NADPH before activity increases.
• B)Glucose-6-phosphate dehydrogenase will be turned on most of the time.
• C)Glucose-6-phosphate is rate limiting for the pentose phosphate pathway.
• D)Glucose-6-phosphate goes preferentially to the pentose phosphate pathway.

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Definitions:

Poiseuille's Law

A principle in fluid dynamics that describes the flow of a fluid through a cylindrical vessel, relating the volume flow rate to the vessel's radius, length, and fluid viscosity.

Viscosity

A measure of a fluid's resistance to flow, related to its thickness or stickiness.

Resistance

The ability of an organism to prevent infection or disease despite exposure to a pathogen; or in physics, the opposition to the flow of electric current.

Poiseuille's Law

describes the flow of a viscous fluid through a long cylindrical pipe, where the flow rate is dependent on the fluid's viscosity, the pressure difference, and the dimensions of the pipe.