[Campbell Biology P.1128] Based on Figure 48.17, which graph best illustrates the effect of a... | Practice Question

Based on Figure 48.17, which graph best illustrates the effect of an inhibitory postsynaptic potential IPSP counteracting an excitatory postsynaptic potential EPSP ?

  • A: Graph (a)
  • B: Graph (b)
  • C: Graph (c)
  • D: Graph (d)

Explanation

Figure 48.17 d shows an excitatory potential E1 followed by an inhibitory potential I which depresses the overall membrane potential, preventing it from reaching the threshold that E1 alone or E1 plus another E1/E2 might have achieved.