TLS Online TPP Program

#Question id: 11206


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?

#I Life Science/ Life Sciences Group – I-V
  1. immediate loss of resting potential
  2. immediate loss of action potential with gradual shift of resting potential
  3. slow decrease of resting potential and action potential amplitudes
  4. No effect; the substances counteract each other.