17 Questions
What is the primary purpose of the acrosomal vesicle in the sea urchin sperm?
To help the sperm penetrate and fuse with the egg
What is the primary role of G-actin in the sea urchin fertilization process?
G-actin helps form the acrosomal vesicle that releases enzymes to penetrate the egg
What is the primary purpose of the fast polyspermy block in the sea urchin egg?
To prevent multiple sperm from fusing with the egg
What is the primary function of the slow polyspermy block in the sea urchin egg?
To trigger the release of cortical granules and harden the egg's surface
What is the primary role of calcium ions (Ca++) in the sea urchin fertilization process?
To trigger the acrosome reaction in the sperm
What is the primary contribution of the cortical granules in the sea urchin egg during fertilization?
To create a fast and slow block to polyspermy by hardening the egg's surface
What is the primary function of the acrosome reaction?
To release enzymes that digest a pathway through the egg's outer layer
What is the role of calcium ions (Ca^{2+}) in the process of fertilization?
To trigger the acrosome reaction and polymerization of actin
What is the primary role of the polymerized actin (F-actin) in the fertilization process?
To change the sperm's morphology and increase its surface area
What is the primary function of the protein Bindin in the fertilization process?
To facilitate the adhesion and fusion of the sperm with the egg
What is the role of cortical granules in the prevention of polyspermy?
They initiate the fast block to polyspermy
What is the primary function of the vitelline envelope during fertilization?
To provide a barrier against polyspermy
Which of the following is the primary role of calcium (Ca++) during fertilization?
To trigger the acrosome reaction in the sperm
What is the primary function of the cortical granules during fertilization?
To provide a barrier against polyspermy by modifying the vitelline envelope
Which of the following is the main function of the acrosome reaction during fertilization?
To degrade the jelly coat and vitelline envelope of the egg
What is the primary role of G-actin during the acrosome reaction?
To provide the structural basis for the formation of the long, stalk-like F-actin
Which of the following is a key step in the process of spermatogenesis?
The formation of haploid gametes from diploid spermatogonia
Learn about the process of sea urchin fertilization, including the roles of bindin, F-actin, vitelline envelope, and jelly coat in the interaction between sperm and egg.
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