Practice question

Hyperactivation is physiological switch in flagellar motility pattern characterized by high-amplitude asymmetric whiplash beating generating greater propulsive force rather than progressive linear motility. Acquired during capacitation via CatSper-mediated calcium entry, hyperactivated motility enables sperm to detach from oviductal epithelium reservoir, traverse viscous cumulus extracellular matrix rich in hyaluronan, and generate sufficient thrust to penetrate zona pellucida matrix. In vitro observations show hyperactivated sperm produce penetration slits through zona. Without this forceful movement even capacitated sperm fail to reach oolemma, fertilize, initiate embryonic development efficiently and achieve monospermy.