PRIN. OF LIFE (LL)-W/ACHIEVE
PRIN. OF LIFE (LL)-W/ACHIEVE
3rd Edition
ISBN: 9781319492069
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 35, Problem 1.1Q
Summary Introduction

To determine: The role played by egg cell membrane change directly after fertilization.

Introduction: The process of union of male gamete (sperm) and female gamete (egg) to develop a fertilized egg is described as fertilization. The fertilized egg is also referred to as a zygote.

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The union of male and female gametes is a complex process. Several male gametes are attracted to a single egg, but only one sperm gets fused with an egg. The activation of an egg by the sperm causes changes in the egg plasma membrane. These changes result in the release of ions that are present with the cytoplasm of the egg. The release of such ions further destroys the zona pellucida and makes it difficult to bind more sperms. Some of these ions also form a protective layer around the egg. Thus, the main functions of these ions are blockage of entry of additional sperm to prevent polyspermy, increase the metabolic rate, start the synthesis of proteins, and reorganization of cytoplasm.

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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY