Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin α6β1. This is called the ________.

A) slow block to polyspermy
B) acrosomal reaction
C) fast block to polyspermy
D) fertilization
E) spermiogenesis

Depolarization

The process in which the resting membrane potential becomes less negative, moving towards zero, typically as a precursor to an action potential in neurons.

Plasma Membrane

The lipid bilayer that encloses the cytoplasm of a cell, regulating the entry and exit of substances in and out of the cell.

Polyspermy

The fertilization of an egg by more than one sperm, which is normally prevented in many species to ensure proper development.