Contraception Q. List the contraceptives whose mode of action is to create a phy
ID: 226827 • Letter: C
Question
Contraception
Q. List the contraceptives whose mode of action is to create a physical barrier between sperm and egg.
Q. List the contraceptives whose mode of action is to create a chemical barrier between sperm and egg.
Q. List the contraceptives whose mode of action is to manipulate physiological processes of ovulation & implantation.
Q. What are the relative failure rates of each of these contraception options? List them in order from least effective to most effective.
Conception
Q. What is the pathway sperm follow from the testes to the ovum?
Q. What is the pathway eggs follow from the ovaries to implantation (assuming it gets
fertilized)?
Q. What is “polyspermy” and why is it necessary to prevent it?
Q. What does the fertilized egg do to prevent polyspermy?
Q. What is the “fertilization membrane”? When is it formed?
Embryo Development
Q. What is a “zygote”?
Q. Once fertilized, does the zygote undergo mitosis or meiosis in order to create a multicellular organism during cleavage?
Walk through the steps of cleavage and gastrulation using technical terms.
Q. What tissue layer is created by the cells that fold inward making the “pouch” inside the hollow ball?
Q. What organs are derived from this germ layer?
Q. How is the middle layer (mesoderm) formed?
Q. What organ systems are derived from this germ layer?
Q. What happens during nervous system formation (neurulation)?
Q. What tissue layer gives rise to the nervous system?
Q. What other structures form alongside the nerve chord at this time?
Q. At what point does the embryo become a fetus?
Q. What are the key developmental milestones that occur during each of the three trimesters of pregnancy?
Q. What is the role of oxytocin in reproduction?
Body [Re]Building
Q. Which engineered tissues have been implanted into humans so far?
Q. What is the difference between bioengineering an organ and traditional organ transplants?
Q. According to the graphic in your textbook, which organ is most needed for transplants? (that is which organ has the greatest unmet demand for organ donation?
Explanation / Answer
Contraceptives whose mode of action is to create physical barrier between sperm and egg are
Condoms(male or female)
Cervical cap
Sterilizations (vasectomy,tubal ligation)
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