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Receptors Linked to a Channel Protein (Quiz 2)

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






1The ligand for the sodium channel is
A)dopamine.
B)adrenaline.
C)acetylcholine.
D)histamine.
E)serotonin.



2The ligand binds to
A)the sodium channel directly.
B)the sodium channel indirectly with the help of G proteins.
C)the sodium channel only after ATP hydrolysis.
D)sodium ions directly.
E)sodium ions indirectly with the help of G proteins.



3Opening of the sodium channel
A)occurs only after ATP hydrolysis.
B)occurs with the help of G proteins.
C)allows the diffusion of Na+ ions out of the cell.
D)allows the diffusion of Na+ ions into the cell.
E)allows the entry of the ligand into the cell.



4The sodium channel is said to be voltage-gated.
A)True
B)False



5When the ligand is not bound, the sodium channel remains closed.
A)True
B)False







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