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Action of Epinephrine on a Liver Cell

View the animation below, then complete the quiz to test your knowledge of the concept.






1Epinephrine binds to
A)α-adrenergic receptors on the cell membrane of liver cells.
B)α-adrenergic receptors in the cytoplasm of liver cells.
C)β-adrenergic receptors on the cell membrane of liver cells.
D)β-adrenergic receptors in the cytoplasm of liver cells.
E)β-adrenergic receptors in the nucleus of liver cells.



2The binding of epinephrine to its receptor activates ________ which in turn activates ________.
A)protein kinase A ; G protein
B)protein kinase A ; adenylyl cyclase
C)adenylyl cyclase ; G-protein
D)G-protein ; adenylyl cyclase
E)G-protein ; protein kinase A



3The enzyme phosphorylase catalyzes the conversion of
A)glycogen into glucose-6-phosphate.
B)glycogen into glucose.
C)glucose into glycogen.
D)glucose into glucose-6-phosphate.
E)glucose-6-phosphate into glycogen.



4Epinephrine causes the liver to uptake glucose from the bloodstream during the fight-or-flight response.
A)True
B)False



5The conversion of ATP into cAMP is catalyzed by the enzyme adenylyl cyclase.
A)True
B)False







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