Term
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Definition
| Nurturing cells for the developing egg |
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Term
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Definition
| Glycoprotein-rich structure surrounding the developing egg |
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Term
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Definition
| Part of sperm surrounding the head that contains enzymes in order to digest the corona radiate and the zona pellucida |
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Term
| 7 Parts of the Human Sperm |
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Definition
1. acrosome
2. head
3. nucleus
4. neck
5. middle piece
6. principle piece
7. End piece |
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Term
| Which part of the sperm contains mitochondria? |
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Definition
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Term
| Day 0 in class is referred to as... |
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Definition
| when fertilization actually occurs |
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Term
| Enzyme which digests the corona radiate |
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Definition
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Term
| Esterases, acrosin and neuraminidase are all ______ that help ______ the _______. |
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Definition
| enzymes, digest, zona pellucida |
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Term
| Explain what the zona reaction is... |
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Definition
| When one sperm breaks thru the zona pellucida. All of the other sperm is "frozen" in place by a gel-like substance which is released when the one sperm penetrates the zona pellucida. |
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Term
| What happens when the plasma membrane of the oocyte and sperm fuse? |
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Definition
| DNA from the sperm is injected into the egg |
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Term
| When is meiosis COMPLETELY completed in the female? |
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Definition
| Not until fertilization of the egg and sperm |
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Term
| When can you distinguish the chromosomal sex of the embryo? |
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Definition
| at the time of fertilization |
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Term
| Morula is when there is __ number of cells within the _____ _______. |
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Definition
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Term
| 5 results of fertilization |
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Definition
1. completion of 2nd meiotic division
2. restoration of diploid number of chromosomes
3. determination of chromosomal sex of embryo
4. metabolic activation of the oocyte
5. initiation of cleacage |
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Term
| During cleavage of the newly made diploid cell from fertilization which phase of mitosis is skipped ? |
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Definition
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Term
| the morula is developed typically on what day? |
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Definition
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Term
| the blasocyst is developed typically on what day(s)? |
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Definition
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Term
| At the end of week ONE what are the 2 layers of cells in the embryo? |
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Definition
| inner cell mass and the trophoblast |
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Term
| The trophoblast seperates into what two layers? and when? |
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Definition
| cytotrophoblast and the syncytiotrophoblast; in the beginning of the second week. |
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Term
| when does implantation occur and what structure actually does the implanting? |
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Definition
| 2nd week; syncytiotrophoblast |
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Term
| what is the hormone that is detected during home pregnancy tests and what structure is responsible for secreting it? |
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Definition
| gonadotropin or HCG; syncytiotrophoblast |
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Term
| what does the inner cell mass divide into? |
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Definition
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Term
| in week 2 a cavity appears in the _______ called the _______ cavity. |
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Definition
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Term
| the epiblast will give rise to _______ layer in week 3 |
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Definition
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Term
| the hypoblast will give rise to _____ in week 3 |
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Definition
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Term
| The prechordal plate is the future site of what? |
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Definition
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Term
| 3 parts of the hypoblast are: |
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Definition
| prechordal plate, yolk sac (primary and secondary), and extraembryonic mesoderm. |
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Term
| blood will first be formed by what structure? |
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Definition
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Term
| the extraembryonic coelom is also known as the ... |
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Definition
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Term
| which type of extraembryonic mesoderm lines the amnion and cytotrophoblast? |
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Definition
| extraembryonic somatic mesoderm |
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Term
| what does the extraembryonic splanchnic mesoderm cover? |
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Definition
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Term
| 3 derivatives of extraembryonic mesoderm and which type they are associated with. |
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Definition
1. connecting stalk ; somatic
2. primitive blood ; splanchnic
3. chorion ; somatic |
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Term
| fertilization occurs where? |
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Definition
| in the distal uterine tube |
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