12 out of 95
Which of the following is blocked by tetrodotoxin:
|A||Na during resting state|
|B||K during resting state|
|C||K during action potential|
|D||Na during action potential|
Ans. D Na during action potential
Sodium channels are blocked by a toxin called TETRODOTOXIN when this toxin is applied to the outside of cell membrane where sodium activation gates are located.