The substance tetrodotoxin (TTX) , found in the ovaries of pufferfish, is useful for studying the ionic mechanisms of the neuron because it
A) selectively blocks sodium channels.
B) selectively blocks potassium channels.
C) prevents ion channels from closing.
D) directly stimulates neurons.
Correct Answer:
Verified
Q1: Ion channels are made of
A) protein.
B) polysaccharide.
C)
Q2: Ions are atoms or molecules that carry
Q3: Refer to the figure. Q4: In general, the action potential is first Q5: Refer to the figure, which shows two Q7: The sodium-potassium pump is responsible for Q8: The giant axons of squids have been Q9: The largest-diameter myelinated axons in mammals conduct Q10: At the K+ equilibrium potential, the electrostatic Q11: An afterpotential is
A) pushing
A) a brief hyperpolarization that
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