2) Glycogen phosphorylase catalyzes the breakdown of glycogen. A) What is the reaction catalyzed by glycogen phosphorylase? B) What are TWO ways (modes of regulation) that the activity of glycogen phosphorylase is controlled- at the level of the enzyme? C) What TWO hormones control the level of activity of glycogen phosphorylase, and WHAT EFFECT (increase/decrease) do these two hormones have on the activity of glycogen phosphorylase? D) Explain how the above listed factors affect the activity of glycogen phosphorylase - at the level of the enzyme. E) Glucagon drives phosphorylation of glycogen phosphorylase and inhibits dephosphorylation. Explain.

2) Glycogen phosphorylase catalyzes the breakdown of glycogen. A) What is the reaction catalyzed by glycogen phosphorylase? B) What are TWO ways (modes of regulation) that the activity of glycogen phosphorylase is controlled- at the level of the enzyme? C) What TWO hormones control the level of activity of glycogen phosphorylase, and WHAT EFFECT (increase/decrease) do these two hormones have on the activity of glycogen phosphorylase? D) Explain how the above listed factors affect the activity of glycogen phosphorylase - at the level of the enzyme. E) Glucagon drives phosphorylation of glycogen phosphorylase and inhibits dephosphorylation. Explain.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section4.6: Introduction To Paracrine Communication

Problem 2CYU: Discuss the roles of phospholipase A2, cyclooxygenase, and lipooxygenase.

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2) Glycogen phosphorylase catalyzes the breakdown of glycogen.
A) What is the reaction catalyzed by glycogen phosphorylase?
B) What are TWO ways (modes of regulation) that the activity of glycogen phosphorylase is controlled – at the level
of the enzyme?
C) What TWO hormones control the level of activity of glycogen phosphorylase, and WHAT EFFECT
(increase/decrease) do these two hormones have on the activity of glycogen phosphorylase?
D) Explain how the above listed factors affect the activity of glycogen phosphorylase - at the level of the enzyme.
E) Glucagon drives phosphorylation of glycogen phosphorylase and inhibits dephosphorylation. Explain.

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