Tetrodotoxin Is a Heat-Stable Molecule Produced by Puffer Fish That

question 17

Multiple Choice

Tetrodotoxin is a heat-stable molecule produced by puffer fish that blocks the entry of sodium ions into neurons. About 10-45 minutes after ingestion of tetrodotoxin, tingling of the tongue and inner surface of the mouth begins. An ascending paralysis develops, and death can occur within 6-24 hours, after respiratory muscle paralysis.
-What does the puffer fish neurotoxin tetrodotoxin directly inhibit?

• A) proteins involved in active transport
• B) channel proteins involved in osmosis
• C) proteins involved in ATP synthesis
• D) channel proteins involved in diffusion
• E) relaxation of muscles

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