Ovulation and Sperm Fertilization Process
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Questions and Answers

What is the primary function of the acrosome reaction in mammalian sperm?

  • To increase the motility of the sperm and help them migrate to the egg
  • To dissolve the egg components and facilitate sperm-egg binding
  • To release enzymes that break down the zona pellucida of the egg (correct)
  • To activate CatSper ion channels and induce hyperactivation
  • Which of the following factors is not essential for successful fertilization in mammals?

  • Acrosin, an enzyme released during the acrosome reaction
  • Izumo1, a sperm membrane protein involved in sperm-egg fusion
  • Sperm-egg binding proteins identified using enzyme inhibitors and antibodies (correct)
  • CatSper, a calcium ion channel that regulates sperm hyperactivation
  • What is the role of capacitation in mammalian sperm?

  • Capacitation increases the motility of the sperm to help them reach the egg
  • Capacitation activates CatSper channels and induces hyperactivation
  • Capacitation primes the sperm for the acrosome reaction (correct)
  • Capacitation is not necessary for fertilization in mammals
  • What is the role of hyperactivation in mammalian sperm?

    <p>Hyperactivation increases the motility of the sperm to help them reach the egg</p> Signup and view all the answers

    Which of the following is a key factor regulating the acrosome reaction in mammalian sperm?

    <p>Progesterone, a steroid hormone released by the cumulus cells surrounding the egg</p> Signup and view all the answers

    Which of the following is a key factor in the regulation of sperm-egg interaction in mammals?

    <p>The zona pellucida, the glycoprotein layer surrounding the egg</p> Signup and view all the answers

    What is the process by which eggs and spermatozoa interact, achieve mutual recognition, and fuse to create a zygote?

    <p>Fertilization</p> Signup and view all the answers

    Which of the following is NOT a factor related to mammalian fertilization?

    <p>Aldosterone hormone</p> Signup and view all the answers

    What is the term used to describe the process where spermatozoa undergo a change in motility patterns to penetrate the zona pellucida?

    <p>Hyperactivation</p> Signup and view all the answers

    Which of the following is a key event during fertilization that involves the release of hydrolytic enzymes for penetration into the egg?

    <p>Acrosome reaction</p> Signup and view all the answers

    What type of molecules has recent work begun to elucidate in terms of essential sperm and egg components for successful fertilization?

    <p>Gene-manipulated animals</p> Signup and view all the answers

    What is the term used to describe the initial fusion of spermatozoa with the zona pellucida of an egg during fertilization?

    <p>Perivitelline space penetration</p> Signup and view all the answers

    What is the primary function of the acrosome reaction in sperm during fertilization?

    <p>To release enzymes and proteins that allow the sperm to penetrate and fuse with the egg</p> Signup and view all the answers

    Which of the following is NOT a component of the cumulus surrounding the ovulated egg?

    <p>Zona pellucida proteins</p> Signup and view all the answers

    What is the role of the zona pellucida surrounding the egg?

    <p>To provide a protective barrier for the egg</p> Signup and view all the answers

    Which of the following events is NOT associated with the capacitation process in sperm?

    <p>Release of enzymes and proteins from the acrosome</p> Signup and view all the answers

    Which of the following statements about the acrosomal vesicle is correct?

    <p>It is surrounded by the outer and inner acrosomal membranes</p> Signup and view all the answers

    During the acrosome reaction, which of the following events occurs?

    <p>The sperm plasma membrane and the outer acrosomal membrane fuse at multiple sites within the acrosomal cap area</p> Signup and view all the answers

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