Human Reproductive System: Sperm Production
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Questions and Answers

Approximately how many sperm are produced by a man during his lifetime?

  • 525 billion (correct)
  • 100 billion
  • 2 trillion
  • 1 trillion

    • What percentage of semen is composed of sperm?

  • 50%
  • 20%
  • 5-10% (correct)
  • 1%

    • How long approximately is each epididymis tube?

  • 20 feet (correct)
  • 5 feet
  • 1 foot
  • 10 feet

    • How long does it take for a sperm to mature?

    <p>2 months</p> Signup and view all the answers

    What are the tubules called where sperm are manufactured?

    <p>Seminiferous tubules</p> Signup and view all the answers

    What is the function of the epididymides?

    <p>To store sperm</p> Signup and view all the answers

    What is the term for the process of the fertilized egg dividing into two, then four cells, and so on?

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

    How many cells does the morula typically consist of?

    <p>16-32 cells</p> Signup and view all the answers

    What is the term for the process by which the blastocyst burrows into the endometrium?

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

    What is the purpose of the yolk sac?

    <p>To help transport nutrients to the embryo</p> Signup and view all the answers

    How many primary germ layers will develop from the embryonic disc?

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

    What is the term for the fluid-filled sac that develops from the amniotic cavity?

    <p>Amniotic sac</p> Signup and view all the answers

    What are the three layers that the embryonic disc differentiates into?

    <p>Endoderm, Mesoderm, and Ectoderm</p> Signup and view all the answers

    By what week does the embryo have a distinct head and tail and a beating heart?

    <p>Week 4</p> Signup and view all the answers

    What is the name of the groove or hollow space between the nose and upper lip?

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

    By what week is the embryo considered a fetus?

    <p>Week 10</p> Signup and view all the answers

    What is developing on the fingers and toes of the fetus by 12 weeks?

    <p>Tiny nails</p> Signup and view all the answers

    What is the fine, downy hair that grows over the body of the fetus by 12 weeks?

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

    What is the main function of the Mitochondria in the midpiece of a sperm cell?

    <p>To provide the sperm cell with energy to move the tail</p> Signup and view all the answers

    What is the primary function of the ovaries in the female reproductive system?

    <p>To release eggs for fertilization</p> Signup and view all the answers

    What is the approximate size of the sperm head?

    <p>1/5000 inch</p> Signup and view all the answers

    What is the purpose of the Acrosome in the sperm head?

    <p>To contain enzymes for penetrating the female egg</p> Signup and view all the answers

    Where are the female reproductive organs located?

    <p>Entirely inside the body</p> Signup and view all the answers

    How often do females release eggs for fertilization?

    <p>Once a month</p> Signup and view all the answers

    What happens to the fetus's appearance during the seventh to eighth month?

    <p>It accumulates fat and becomes chubby</p> Signup and view all the answers

    What is the approximate duration of each trimester?

    <p>Three calendar months</p> Signup and view all the answers

    What is the function of the placenta?

    <p>To provide oxygen and nutrients to the fetus and remove waste products</p> Signup and view all the answers

    What is a common symptom experienced by the mother during the first trimester?

    <p>Nausea and vomiting</p> Signup and view all the answers

    What happens to the mother's skin during the third trimester?

    <p>It stretches over the abdomen</p> Signup and view all the answers

    What is attached to the center of the placenta?

    <p>The umbilical cord</p> Signup and view all the answers

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