What permeability changes would you expect to occur at the postsynaptic neuron when presynaptic neuron X is stimulated? (Remember that the postsynaptic neuron becomes hyperpolarized by presynaptic neuron X.) A)increased P_Na+ and P_K+ B)increased P_K+ or P_Cl- C) increased P_A- D) increased P_Ca2+

Question

Quizplus · Accepted Answer

When the presynaptic neuron X is stimulated and the postsynaptic neuron becomes hyperpolarized, it means that the postsynaptic neuron's membrane potential has become more negative, which decreases the likelihood of an action potential. This can occur by an increase in the permeability of the membrane to either potassium ions (K+) or chloride ions (Cl-) or a decrease in the permeability to sodium ions (Na+). Therefore, the best choice for this question is B, as it includes the options for increased permeability to K+ or Cl-, which are the most likely ions to cause hyperpolarization.

What Permeability Changes Would You Expect to Occur at the Postsynaptic