Tetrodotoxin Is a Potent Poison,produced by Some Newts,pufferfish,and Blue-Ringed Octopus

question 73

Multiple Choice

Tetrodotoxin is a potent poison,produced by some newts,pufferfish,and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons.A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick.The most likely action the poison takes is

• A)Mimicking a symporter and allowing sodium to rush out and potassium to rush in.
• B)Mimicking an antiporter and allowing sodium to rush out.
• C)Blocking an antiporter so sodium cannot rush in.
• D)Blocking a symporter and keeping sodium from rushing in.

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