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Questions and Answers
During which process does the sperm cell penetrate the zona pellucida and bind with the cell membrane of the ovum?
During which process does the sperm cell penetrate the zona pellucida and bind with the cell membrane of the ovum?
- Fertilisation (correct)
- Amphimixis
- Ovulation
- Cleavage
What is the term for the nucleus of the sperm and the nucleus of the ovum before they are fused?
What is the term for the nucleus of the sperm and the nucleus of the ovum before they are fused?
- Embryoblast
- Trophoblast
- Pronuclei (correct)
- Blastomere
What is the name of the process by which the zygote forms an embryo through mitotic cell divisions?
What is the name of the process by which the zygote forms an embryo through mitotic cell divisions?
- Fertilisation
- Cleavage (correct)
- Amphimixis
- Ovulation
What is the name of the outer layer responsible for supplying nutrients and giving rise to the placenta?
What is the name of the outer layer responsible for supplying nutrients and giving rise to the placenta?
What is the term for the stage in embryonic development where there is a hollow sphere of blastomeres surrounding an inner fluid-filled cavity?
What is the term for the stage in embryonic development where there is a hollow sphere of blastomeres surrounding an inner fluid-filled cavity?
What is the term for the stage in embryonic development where there is a blastula with an inner fluid-filled cavity and an inner cell mass called the embryoblast?
What is the term for the stage in embryonic development where there is a blastula with an inner fluid-filled cavity and an inner cell mass called the embryoblast?
What is the process by which the ovum thickens its zona pellucida layer to prevent polyspermy?
What is the process by which the ovum thickens its zona pellucida layer to prevent polyspermy?
What is the name of the nucleus of the sperm and the nucleus of the ovum before they are fused during fertilization?
What is the name of the nucleus of the sperm and the nucleus of the ovum before they are fused during fertilization?
During which stage does the zygote form a morula containing 8 blastomere cells surrounded by the zona pellucida?
During which stage does the zygote form a morula containing 8 blastomere cells surrounded by the zona pellucida?
What is the name of the outer layer responsible for insulating and supplying nutrients during early embryonic development?
What is the name of the outer layer responsible for insulating and supplying nutrients during early embryonic development?
What is the name of the stage in embryonic development where a blastula forms with an inner cell mass called the embryoblast?
What is the name of the stage in embryonic development where a blastula forms with an inner cell mass called the embryoblast?
What is the process by which the ovum thickens its zona pellucida layer to prevent polyspermy?
What is the process by which the ovum thickens its zona pellucida layer to prevent polyspermy?
During which process does the sperm cell penetrate the zona pellucida and bind with the cell membrane of the ovum?
During which process does the sperm cell penetrate the zona pellucida and bind with the cell membrane of the ovum?
What is the term for the stage in embryonic development where there is a hollow sphere of blastomeres surrounding an inner fluid-filled cavity?
What is the term for the stage in embryonic development where there is a hollow sphere of blastomeres surrounding an inner fluid-filled cavity?
What is the name of the nucleus of the sperm and the nucleus of the ovum before they are fused during fertilization?
What is the name of the nucleus of the sperm and the nucleus of the ovum before they are fused during fertilization?
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Study Notes
Fertilization
- Sperm cell penetrates the zona pellucida and binds with the cell membrane of the ovum during fertilization
- The nucleus of the sperm and the nucleus of the ovum before they are fused is called a pronucleus
Early Embryonic Development
- The process by which the zygote forms an embryo through mitotic cell divisions is called cleavage
- The outer layer responsible for supplying nutrients and giving rise to the placenta is called the trophectoderm
- The outer layer that insulates and supplies nutrients during early embryonic development is called the trophectoderm
Blastula Stage
- The stage in embryonic development where there is a hollow sphere of blastomeres surrounding an inner fluid-filled cavity is called the blastula
- The stage in embryonic development where there is a blastula with an inner fluid-filled cavity and an inner cell mass called the embryoblast is called the blastula
Zygote Development
- The zygote forms a morula containing 8 blastomere cells surrounded by the zona pellucida during the morula stage
- The process by which the ovum thickens its zona pellucida layer to prevent polyspermy is called the zona reaction
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