[Campbell Biology P.1095] What is the primary role of the increase in cytoplasmic Ca2+ concen... | Practice Question

What is the primary role of the increase in cytoplasmic Ca2+ concentration during egg activation?

  • A: To inhibit protein synthesis.
  • B: To trigger the fusion of cortical granules with the plasma membrane.
  • C: To initiate meiosis II completion in all species.
  • D: To facilitate the fast block to polyspermy.

Explanation

The text states, "The resulting increase in Ca2+ level causes cortical granules to fuse with the plasma membrane. A cortical reaction triggered by Ca2+ also occurs in vertebrates such as fishes and mammals." It further explains that the rise in Ca2+ concentration causes the cortical reaction, which in turn causes egg activation.