Question

At the moment of sperm penetration, human eggs ______. A. have used flagellar propulsion to move from the ovary to the oviduct B. are still located within the ovary C. have a paper-thin cell of calcium carbonate that prevents desiccation D. are still surrounded by follicular cells

Answer 1

During sperm penetration, human eggs are still surrounded by follicular cells.

Therefore, the correct answer is Option D.

What changes does egg undergo for fertilization?

• An egg goes through a few changes at the hour of sperm penetration during fertilization.
• These progressions happen at the cell surface, in development, physiology and gene expression.
• For fertilization, a sperm should combine with the cell membrane and afterward infiltrate the egg cells.
• Infiltration through the egg cell or extracellular matrix (ECM) is a troublesome task.
• The acrosome of the egg goes through acrosomal reaction to get through the hard shell of cell.
• To go through the follicle cells encompassing the egg or oocyte, the sperm discharges hyaluronidase enzyme.
• This chemical isn't delivered until the sperm comes into contact with the egg cell's zona pellucida.

Learn more about fertilization here:

brainly.com/question/18117670

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