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Test your basic knowledge |
PCAT Biology Vertebrate Embryology
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Subjects
:
pcat
,
biology
Instructions:
Answer 34 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Encloses the yolk. blood vessels in the yolk sac transfer food to the developing embryo
Nonplacental Internal Development
Gastrulation
Placental Internal Development
Yolk Sac
2. A series of rapid mitotic divisions in early embryonic development -lead to an increase in cell number without a corresponding growth in cell protoplasm
Fraternal Twins
Third Trimester
Ectoderm
Cleavage
3. If more than one egg is fertilized
Ectoderm
Fraternal Twins
Morula
Growth
4. Solid ball of embryonic cells when cell division occurs
Cleavage
Ectoderm
Amnion
Morula
5. Begins when the morula develops a blastocoel
Blastulation
Morula
Childbirth
Amnion
6. Sac-like structure is involved in respiration and excretion and contains numerous blood vessels to transport (2 - CO2 - water - salt - and N wastes
First Stage of Labor
Neurulation
Yolk Sac
Allantois
7. This system not only supplies oxygen and nutrients to the fetus but removes CO2 and metabolic wastes as well -two components of this system are the placenta and umbilical cord - which both develop in the first few weeks after fertilization
Growth
External Development
Placental Internal Development
Childbirth
8. Cells at the tip of each neural fold and give rise to sensory ganglia - autonomic ganglia - adrenal medulla - and Schwann cells
Second Stage of Labor
Blastulation
Second Trimester
Neural Crest Cells
9. The study of the development of a unicellular zygote into a complete - multicellular organism
Allantois
Ectoderm
Embryology
External Development
10. Occurs in the lateral - widest portion of the oviduct when sperm traveling from the vagina encounter an egg -can occur within 12-24 hours after ovulation
Placental Internal Development
First Trimester
Fertilization
Blastocoel
11. Major organs begin to develop -cartilaginous skeleton begins to turn into bone by the seventh week -organs will form - brain is fairly developed - and the embryo is referred to as a fetus
First Trimester
Embryology
Blastocoel
Chorion
12. Ex: marsupials and some tropical fish -without a placenta - exchange of food and oxygen between the young and the mother is limited
Third Trimester
Amnion
Nonplacental Internal Development
Gametogenesis
13. Fluid-filled cavity developed through blastulation
Internal Development
Blastocoel
Ectoderm
Cleavage
14. Epithelial linings of the digestive and respiratory tracts (including the lungs) and parts of the liver - pancreas - thyroid - and bladder lining
Organogenesis
Endoderm
Chorion
Labor
15. Eggs develop in women and sperm develop in men - which results in the possibility of reproduction occuring
Blastocoel
Placental Internal Development
Chorion
Gametogenesis
16. Three-layered structure that is created when cell migrations - once implanted in the uterus - transform the single-cell layer of blastula
Gastrulation
Growth
Childbirth
Mesoderm
17. Accomplished by labor
Gastrulation
Nonplacental Internal Development
Childbirth
Labor
18. The fetus does a termendous amount of growing -begins to move around in the amniotic fluid - its face appears human - and its toes and fingers elongate
Gastrulation
Nonplacental Internal Development
Second Trimester
Third Trimester
19. Lines the inside of the shell. it is a moist membrane that permits gas exchange
Blastocoel
Chorion
Allantois
Cleavage
20. The embryo develops within the egg - feeding on nutrients stored in the yolk
Amnion
External Development
Third Trimester
First Stage of Labor
21. Organs increase in size - which is a continual process from infancy to childhood to adulthood
Ectoderm
Growth
Blastocoel
Yolk Sac
22. Characterized by continued rapid growth and further brain development -antibodies are transported by highly selective active transport from the mother to the fetus for protection against foreign matter
Third Trimester
Blastulation
Cleavage
Internal Development
23. Cervix thins out and dilates - and the amniotic sac ruptures - releasing its fluids -contractions are relatively mild
Organogenesis
Second Stage of Labor
First Stage of Labor
Blastula
24. A rod of mesodermal cells that develops along the longitudinal axis just under the dorsal layer of ectoderm
Notochord
Fertilization
External Development
Ectoderm
25. Characterized by rapid contractions - resulting in the birth of the baby - folllowed by the cutting of the umbilical cord
Placental Internal Development
Second Stage of Labor
Endoderm
Final Stage of Labor
26. Integument (including the epidermis - hair - nails - and epithelium of the nose - mouth - and anal canal) - the lens of the eye - the retina and the nervous system
Ectoderm
Internal Development
Notochord
First Trimester
27. Musculoskeletal system - circulatory system - excretory system - gonads - connective tissue throughout the body - and portions of digestive and respiratory organs
Mesoderm
Final Stage of Labor
Second Stage of Labor
Blastula
28. Process that - by the end of gastrulation - regions of the germ layers begin to develop into a rudimentary nervous system
Mesoderm
Neurulation
Ectoderm
Placental Internal Development
29. A series of strong uterine contractions
Yolk Sac
Morula
Second Trimester
Labor
30. The body organs begin to form. in this process - the cells interact - differentiate - change physical shape - proliferate - and migrate
Allantois
Fraternal Twins
Chorion
Organogenesis
31. Membrane encloses the amniotic fluid. amniotic fluid provides an aqueous environment that protects the developing embryo from shock
Chorion
Growth
Morula
Amnion
32. Uterus contracts - expelling the placenta and the umbilical cord
Final Stage of Labor
Labor
First Trimester
Third Trimester
33. Includes organogenesis - growth - gametogenesis
Internal Development
Notochord
Neural Crest Cells
Endoderm
34. Hollow sphere of cells of cells which is the blastocoel on the fourth day -the stage of the embryo that implants in the uterus
Cleavage
Blastula
Neurulation
Blastulation