Chapter 15. Regulation of Glycogen Metabolism by cAMP and PKA

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Animation Activity 15-28: Regulation of Glycogen Metabolism by cAMP and PKA

1.

Active PKA plays what role(s) in glycogen metabolism?

inhibition of glycogen synthesis

stimulation of glycogen breakdown

inactivation of glycogen synthase (GS)

activation of the enzyme GPK

All of the above

Correct.

Incorrect.

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2.

The enzyme PP is activated by decreased _______________ levels to promote ______________ glycogen synthesis via activation of _______________.

glycogen synthase (GS); increased; PKA

cAMP; increased; glycogen synthase (GS)

cAMP; increased; GPK

GPK; decreased; glycogen synthase (GS)

glycogen synthase (GS); decreased; PKA

Correct.

Incorrect.

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3.

The enzymes GPK, GP, and GS are all counteracted by:

phosphoprotein phosphatase (PP).

cAMP.

PKA.

glycogen.

glucose-1-phosphate.

Correct.

Incorrect.

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4.

The overall result of increased cAMP levels is:

decreased glycogen breakdown.

increased glycogen synthesis.

elevated glycogen levels in the cell.

elevated glucose 1-phosphate levels in the cell.

All of the above.

Correct.

Incorrect.

Try Again.

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Chapter 15. Regulation of Glycogen Metabolism by cAMP and PKA

Introduction

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