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Questions and Answers
During weeks 14-16 of fetal development, which substances can cross the placenta through simple diffusion?
During weeks 14-16 of fetal development, which substances can cross the placenta through simple diffusion?
- Antibiotics and pathogens
- Amino acids and iron
- O2, CO2, and other gases (correct)
- Lipid-soluble fetotoxic substances
When does sexual differentiation typically begin?
When does sexual differentiation typically begin?
- Weeks 31-34
- Weeks 9-12 (correct)
- Weeks 21-24
- Weeks 14-16
What happens to the blood in the heart during weeks 9-12?
What happens to the blood in the heart during weeks 9-12?
- It flows through the foramen ovale and ductus arteriosus (correct)
- It flows through the pulmonary artery
- It flows through the superior vena cava
- It flows through the aorta
During weeks 13-16, what can be observed in the fetus?
During weeks 13-16, what can be observed in the fetus?
What is the effect of estrogen on the mother during pregnancy?
What is the effect of estrogen on the mother during pregnancy?
Which hormone stimulates the growth of mammary glands?
Which hormone stimulates the growth of mammary glands?
What is the result of the fusion of sperm and oocyte nuclei during fertilization?
What is the result of the fusion of sperm and oocyte nuclei during fertilization?
What is the primary function of the acrosomal reaction during fertilization?
What is the primary function of the acrosomal reaction during fertilization?
What is the term for the first two weeks of development after fertilization?
What is the term for the first two weeks of development after fertilization?
What is the primary function of the placenta during embryonic development?
What is the primary function of the placenta during embryonic development?
What is the term for the indentation that forms during week 3 of embryogenesis, allowing cells to travel along and form endoderm or mesoderm?
What is the term for the indentation that forms during week 3 of embryogenesis, allowing cells to travel along and form endoderm or mesoderm?
What is the result of the fusion of maternal and embryonic tissues during placenta development?
What is the result of the fusion of maternal and embryonic tissues during placenta development?
What is the term for the fluid-filled sac that surrounds the embryo and provides protection?
What is the term for the fluid-filled sac that surrounds the embryo and provides protection?
What is the percentage of blastocysts that fail to implant in the uterine wall?
What is the percentage of blastocysts that fail to implant in the uterine wall?
What is the term for the type of twins that form when a single fertilized egg splits in two?
What is the term for the type of twins that form when a single fertilized egg splits in two?
When is the placenta fully developed and functional?
When is the placenta fully developed and functional?
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