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29 Cards in this Set
- Front
- Back
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What do Leydig cells produce?
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Testosterone
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Describe the volume of semen that the seminal vesicles contribute?
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60% of semen volume; thick, yellow, alkaline; mucus, fructose, coagulating enzyme, ascorbic acid, and prostaglandins
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Describe the volume of semen that the prostate gland contribute?
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30% of semen volume: thin, milky; citrate and anticoagulant enzymes
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What is vasocongestion?
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The filling of tissue with blood.
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What is myotonia?
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Increased muscle tenstion
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What do Sertoli cells do?
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Nourish developing sperm
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What does hCG do?
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Maintains the secretion of progesterone and estradiol by the corpus luteum through the first few months of pregnancy.
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What is a blastocyst?
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A sphere a cells surrounding a central cavity.
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What is a trophoblasts?
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The outer layer of the blastocyst.
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What eventually forms the placenta?
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The trophoblast mingling with the endometrium.
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What is the zona pellucida?
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The extracellular matrix surrounding a mammalian egg.
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What are totipotent cells?
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Have the ability of a single cell to divide and produce all the differentiated cells in an organism, including extraembryonic tissues.
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What are pluripotent cells?
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Have the potential to differentiate into any of the three germ layers.
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What are oligopotent cells?
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Have the ability to differentiate into a few cells (different tissues).
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What are multipotent cells?
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Have the potential to give rise to cells from multiple, but limited number of lineages. (one tissue, different lineage)
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What are unipotent cells?
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Have the capacity to develop/differentiate into only one type of tissue/cell type. (one tissue, one lineage)
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What is a blastomere?
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an early embryonic cell arising during the cleavage stage of an early embryo.
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What is a blastula?
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A hollow ball of cells that marks the end of the cleavage stage during early embryonic development in animals.
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What is blastocoel?
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The fluid-filled cavity that forms in the center of a blastula.
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What is holoblastic cleavage?
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Type of cleavage in which there is complete division of the egg.
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What is meroblastic cleavage?
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Type of cleavage in which there is incomplete division of a yolk-rich egg.
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What is the primitive streak?
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A thickening along the future anterior-posterior axis on the surface of an early avian or mammalian embryo.
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What is an archenteron?
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The endoderm-lined cavity, formed during gastrulation, that develops into the digestive tract of an animal.
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What is the blastopore?
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The open end of the archenteron, which will become the anus.
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What is an amniote?
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Organism that has an amniotic egg, which contains specialized membranes, including the fluid-filled amnion, that protect the embryo. (Mammals, birds, and other reptiles)
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What is the chorion?
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Extraembryonic membrane that completely surrounds the embryo and the other extraembryonic membranes (functions in gas exchange)
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What is the amnion?
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Extraembryonic membrane that eventually encloses the embryo in a protective fluid filled amniotic cavity.
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What is the yolk sac?
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Extraembryonic membrane that encloses the yolk, and provides nutrients until the time of hatching?
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What is the allantois?
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Extraembryonic membrane that disposes of waste products and contributes to gas exchange.
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