The Toxins Responsible for Most Shellfish Poisonings Are Water-Soluble,heat and Acid-Stable,and

question 66

Multiple Choice

The toxins responsible for most shellfish poisonings are water-soluble,heat and acid-stable,and ordinary cooking methods do not eliminate the toxins.Would you predict saxitoxin to affect myelinated and non-myelinated neurons equally?

• A)Yes, because all neurons have Na⁺ transporters
• B)No, because saxitoxin will not be able to diffuse through the myelin
• C)Yes, because saxitoxin works at the synapses of neurons, and thus would be able to access both types of neurons equally
• D)No, because myelinated neurons have a smaller Na⁺ gradient, and thus will be more resistant

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