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| In an adult mail, the ________________ extends through the inguinal canal. |
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| Granulosa cells surround a: |
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| Sperm pass through several stages during their development. The earliest stage in which the cell becomes haploid is the: |
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| The trophoblast secretes ____________ that signals the corpus luteum that pregnancy has begun. |
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| The extraembryonic membrane closest to the embryo is the: |
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| before sperm can compete in fertilization, it must undergo a maturation process in the female reproductive tract known as: |
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| The lining of the uterus is called the: |
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| In sea urchins, the fertilization envelope forms from the: |
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| The first system to develop in the vertebrate embryo is the: |
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| In mammals, the _____________ is a temporary center for the formation of blood cells. |
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| The female erectile structure analogous to the male glans penis is the: |
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| After fertilization, which hormone is secreted by the developing embryo to maintain the function of the corpus lutem? |
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| One function of the developing follicle is to: |
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| In organogenesis, the ectoderm gives rise to: |
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| Which cells in the testes produce testosterone? |
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| The inguinal canal is located in the: |
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| The ______________ develops into a corpus luteum. |
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| Currently, the most effective method of birth control is: |
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| The term "archenteron" refers to the developing: |
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| In the female, _________________ stimulates follicle maturation. |
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| Embryonic mesoderm forms the: |
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| A human embryo is capable of movement and has gonads that are distinguishable as either testes or ovaries by the end of the: |
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| An example of a primary sex characteristic in males is: |
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| A primitive groove is the equivalent of a: |
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| The erectile tissue in the penis includes the: |
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| The mechanism that leads directly to morphogenesis is |
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| The main function of the acrosome reaction is to: |
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Definition
| facilitate penetration of the egg coverings by the sperm. |
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| The fast block to polyspermy in sea urchin |
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Definition
| is a depolarization of the egg plasma membrane. |
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| Place events of sea urchin fertilizaion in order: 1. fusion of egg and sperm pronuclei 2. DNA synthesis 3. increased protein synthesis 4. release of calcium ions into cytoplasm |
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Definition
| release of calcium ions into cytoplasm -> increased protein synthesis -> fusion of egg and sperm pronuclei -> DNA synthesis |
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| The cleavage divisions of a sea urchin embryo do/do not occur at the vegetal pole. |
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| Meroblastic cleavage is typical of embryos formed from ___________ eggs. |
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| The primitive groove of the bird embryo is the functional equivalent of the ____________ in the amphibian embryo. |
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Which of the following are mismatched?
ectoderm; circulator system
endoderm; lining of the digestive tube
mesoderm; notochord
mesoderm; reproductive system
ectoderm; sense organ |
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Definition
| ectoderm; circulator system |
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| What has three germ layers? |
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| An unidentified substance (or substances) released from the developing notochord causes the overlying ectoderm to form the neural plate. This phenomenon is known as: |
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| What consists of both fetal and maternal tissue? |
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| The embryo proper of a mammal develops from the |
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