Tetrodotoxin Blocks Voltage-Gated Sodium Channels and Ouabain Blocks Sodium-Potassium Pumps

question 29

Multiple Choice

Tetrodotoxin blocks voltage-gated sodium channels and ouabain blocks sodium-potassium pumps.If you added both tetrodotoxin and ouabain to a solution containing neural tissue,what responses would you expect?

• A)immediate loss of resting potential
• B)immediate loss of action potential with gradual loss of resting potential
• C)slow decrease of resting potential and action potential amplitudes
• D)no effect;the substances counteract each other

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