36 Questions
Which enzyme is activated by adenylyl cyclase in the liver during low blood glucose levels?
Phosphorylase kinase
What is the effect of PKA on phosphorylase kinase?
It inactivates the 'b' form and produces the 'a' form.
What is the function of phosphorylase kinase in glycogen breakdown?
It phosphorylates and activates glycogen phosphorylase.
What is the role of glucagon in hormonal regulation of glycogen breakdown?
It activates adenylyl cyclase in the liver.
What is the effect of cAMP on PKA during hormonal regulation of glycogen breakdown?
It activates PKA.
What is the function of glycogen phosphorylase in glycogen breakdown?
It breaks down glycogen into glucose-6-phosphate.
What is the effect of phosphorylation on the activity of phosphorylase kinase?
It inactivates the 'b' form and activates the 'a' form.
What is the effect of insulin on glycogen breakdown?
It inhibits glycogen breakdown.
What is the effect of low blood glucose levels on glucagon secretion?
It stimulates glucagon secretion.
What is the effect of PKA on glycogen synthase during hormonal regulation of glycogen breakdown?
It inhibits glycogen synthase.
What is the effect of phosphorylation on the activity of glycogen phosphorylase?
It activates the 'a' form and inactivates the 'b' form.
What is the effect of glucagon on insulin secretion during hormonal regulation of glycogen breakdown?
It inhibits insulin secretion.
Which enzyme is activated by adenylyl cyclase in the liver during low blood glucose levels?
Phosphorylase kinase
What is the effect of PKA on phosphorylase kinase?
It inactivates the 'b' form and produces the 'a' form.
What is the function of phosphorylase kinase in glycogen breakdown?
It phosphorylates and activates glycogen phosphorylase.
What is the role of glucagon in hormonal regulation of glycogen breakdown?
It activates adenylyl cyclase in the liver.
What is the effect of cAMP on PKA during hormonal regulation of glycogen breakdown?
It activates PKA.
What is the function of glycogen phosphorylase in glycogen breakdown?
It breaks down glycogen into glucose-6-phosphate.
What is the effect of phosphorylation on the activity of phosphorylase kinase?
It inactivates the 'b' form and activates the 'a' form.
What is the effect of insulin on glycogen breakdown?
It inhibits glycogen breakdown.
What is the effect of low blood glucose levels on glucagon secretion?
It stimulates glucagon secretion.
What is the effect of PKA on glycogen synthase during hormonal regulation of glycogen breakdown?
It inhibits glycogen synthase.
What is the effect of phosphorylation on the activity of glycogen phosphorylase?
It activates the 'a' form and inactivates the 'b' form.
What is the effect of glucagon on insulin secretion during hormonal regulation of glycogen breakdown?
It inhibits insulin secretion.
Which enzyme is activated by adenylyl cyclase in response to low blood glucose levels?
Protein kinase A
What is the inactive form of phosphorylase kinase called?
b form
What is the net result of the activation of glycogen phosphorylase?
Rapid activation of glycogen breakdown
What is the role of glucagon in the hormonal regulation of glucose levels?
It activates adenylyl cyclase in the liver
What is the role of cAMP in the hormonal regulation of glucose levels?
It activates protein kinase A
What is the active form of phosphorylase kinase called?
a form
What is the enzyme that is phosphorylated by PKA in the hormonal regulation of glucose levels?
Phosphorylase kinase
What is the result of PKA phosphorylating the inactive “b” form of phosphorylase kinase?
Production of the active “a” form of phosphorylase kinase
What is the role of phosphorylase kinase in the hormonal regulation of glucose levels?
It activates glycogen phosphorylase
What is the enzyme that is activated by phosphorylase kinase in the hormonal regulation of glucose levels?
Glycogen phosphorylase
What is the result of the activation of glycogen phosphorylase in the hormonal regulation of glucose levels?
Rapid activation of glycogen breakdown
What is the role of insulin in the hormonal regulation of glucose levels?
It stimulates glucose uptake by cells
Test your knowledge of hormonal regulation with this quiz on the functions of glucagon and insulin. Learn how low blood glucose levels trigger the secretion of glucagon, which activates adenylyl cyclase in the liver and forms cAMP. Discover how cAMP activates protein kinase A (PKA), which catalyzes the phosphorylation of phosphorylase kinase, and the different forms it exists in. Challenge yourself with this quiz and become an expert on hormonal regulation.
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