Exam One Ch. One
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Last updated 9:08 PM on 9/9/23
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32 Terms
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At the end of 8 weeks, why is the conceptus considered a fetus?
All organ systems are present
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In which skin layer is areolar tissue found?
Papillary layer
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Hair growth cycles:
Anagen, catagen, telogen
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Most cells in the body have
Cell membrane, organelles, and cytoplasm
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Pre-embryo stage
Fertilization to 2 weeks
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Embryonic Stage
2 weeks to 8 weeks
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Basic organ development
between 4 and 24 weeks
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Fertilization occurs in
uterine tube
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Ball of multiple cells is called
Morula
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Trophoblasts turn into
part of the placenta
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hollow ball of cells is a
blastocyst
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At what developmental stage does the conceptus implant in the uterine wall?
blastocyst
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Gastrulation
Embryoblast folds in on itself to create a single layer of cells, then into a ball of cells with three different layers.
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Ectoderm develops into
skin and nervous systems
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mesoderm develops into
muscle, connective tissue, bone, blood, and blood vessels
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Endoderm develops into
lining of digestive track, lungs, and glands
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Which are the stages of prenatal development in the correct order?
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Which are the stages of prenatal development in the correct order?
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Zygote, cleavage, morula, trophoblast, embryo, fetus
Zygote, cleavage, morula, trophoblast, embryo, fetus
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Trimester One
0-13 weeks
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Trimester 2
14-27 weeks
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Trimester 3
28-42 weeks
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Which of the following lists the levels of human structure *from smallest to largest?*
Atom, Molecule, macromolecule, Organelles, cells, tissues, organs, organ systems, human body
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What is in the posterior dorsal cavity?
Cranial cavity and vertebral canal
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At what developmental stage does the conceptus reach the uterus?
Morula
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What is in the anterior ventral cavity?
Thoracic cavity, abdominopelvic cavity
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What is in the thoracic cavity
Pleural cavity, pericardial cavity, mediastinum
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What is in the abdominal cavity?
Digestive Organs, spleen, kidneys
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What is in the pelvic cavity?
Bladder, rectum, reproductive organs
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Which have a double layer of membrane?
pleural, pericardial, peritoneal
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What layer lines a cavity?
Parietal
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What layer lines an organ?
Visceral
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3 layers in development?
Ectoderm, mesoderm, endoderm
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Most organs contain tissues derived from
more than one layer
Note 
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