Developmental Biology Exam 4 Questions With Correct Answers

Developmental Biology Exam 4
Questions With Correct Answers

intermediate mesoderm - CORRECT ANSWER✔✔-adjacent to paraxial
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mesoderm/somite. Forms as strips of tissue along an A-P axis from heart region
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to tail bud.
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Urogenital system |




lateral plate mesoderm - CORRECT ANSWER✔✔-somatic and splanchnic
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somatic mesoderm - CORRECT ANSWER✔✔-later plate mesoderm that forms
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limb buds
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splanchnic mesoderm - CORRECT ANSWER✔✔-lateral plate mesoderm that will
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form heart and mesenteries
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mesenteries - CORRECT ANSWER✔✔-form "wallpaper" forms a barrier and
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secrets mucous for lubrication. tissues that connect parts of the intestine to the
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abdominal wall. |




cloaca - CORRECT ANSWER✔✔-(Latin for sewer) - in mammals it is only
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embryonic - collects drainage from gut, developing urogenital system. Retained in
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birds. Tissue that will degrade will become a functional filtering system that
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,collects fluids that are being filtered. Invertebrates have this but in humans its
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only temporary.
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pronephros, mesonephros, and metanephros - CORRECT ANSWER✔✔-Three
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successive embryonic kidneys form (A-P):
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mesonephros - CORRECT ANSWER✔✔-pronephros - induces the
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metanephros - CORRECT ANSWER✔✔-mesonephros induces the
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functional kidney - CORRECT ANSWER✔✔-metanephros is the
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Pro- and meso-nephros - CORRECT ANSWER✔✔-degenerate or become part of
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male internal genitalia.
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pronephros - CORRECT ANSWER✔✔-Forms as a tube of intermediate mesoderm
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that connects with cloaca. Mesenchymal to epithelial transition.
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mesonephros tubules - CORRECT ANSWER✔✔-will enclose capillary tufts that
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have migrated toward them which will eventually form a filtering system
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Males: Will reform as internal male genitalia.
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Females: degrades - CORRECT ANSWER✔✔-What is the fate of the mesonephric
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duct (males and females)?
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, posterior to the mesonephros - CORRECT ANSWER✔✔-mesonephric duct forms a
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bud - the uretic bud, where?
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anteriorly - CORRECT ANSWER✔✔-the uretic bud grows
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branches of the uretic bud - CORRECT ANSWER✔✔-these will be the collecting
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tubules/ducts of the kidney | | |




uretic bud - CORRECT ANSWER✔✔-signals to the surrounding intermediate
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mesoderm to form the renal tubules. | | | | |




renal tubules - CORRECT ANSWER✔✔-connect with the collecting tubules for
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form one continuous system.
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metanephric mesenchyme - CORRECT ANSWER✔✔-Requires expression of WT1 -
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Wilm's Tumor1 to be competent for induction of metanephric tubules.
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nephrogenic mesenchyme - CORRECT ANSWER✔✔-Vascular endothelial
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precursors move to the tips of the renal tubes and develop into the glomerulus.
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Differentiate into nephrons | |




nephron - CORRECT ANSWER✔✔-the filtering unit of the mature kidney
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pax 2 - CORRECT ANSWER✔✔-is expressed in mesenchyme
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