3.5 Germ-Layer Derivatives — RBR Life Science

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Welcome! Germ-Layer Derivatives & Extra-Embryonic Membranes — 21 questions across 2 tests.

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3.5 Germ-Layer Derivatives Test 1 11 questions • ectoderm/mesoderm/endoderm fates, extra-embryonic membranes ▾

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3.5 Germ-Layer Derivatives Test 2 10 questions • ectoderm/mesoderm/endoderm fates, extra-embryonic membranes ▾

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3.5 Germ-Layer Derivatives — Test 1

Q1. The three primary germ layers of a triploblastic embryo are:✓ Ectoderm, mesoderm and endoderm

Q2. The nervous system and epidermis are derived from the:✓ Ectoderm

Q3. Bones, muscles and the circulatory system are derived mainly from the:✓ Mesoderm

Q4. The lining of the gut and the alveolar cells of the lung are derived from the:✓ Endoderm

Q5. Bones of vertebrate embryos are derived from the:✓ Mesoderm

Q6. Red blood cells are derived from which germ layer?✓ Mesoderm

Q7. Facial muscles and most skeletal muscle are derived from the:✓ Mesoderm

Q8. Neurons of the brain originate from the:✓ Ectoderm

Q9. The neural crest, which forms many structures, is derived from the:✓ Ectoderm

Q10. The extra-embryonic membrane that stores metabolic waste and aids gas exchange in amniotes is the:✓ Allantois

Q11. The fluid-filled membrane that surrounds and protects the amniote embryo is the:✓ Amnion

3.5 Germ-Layer Derivatives — Test 2

Q12. The amnion is derived from the:✓ Somatopleure

Q13. The outermost extra-embryonic membrane, important in gas exchange and (in mammals) placenta formation, is the:✓ Chorion

Q14. The yolk sac in vertebrate embryos functions to:✓ Supply nutrients from the yolk and form early blood cells

Q15. The kidneys and gonads develop from the:✓ Mesoderm (intermediate mesoderm)

Q16. The liver and pancreas are derived from the:✓ Endoderm

Q17. The dermis of the skin is derived mainly from the:✓ Mesoderm

Q18. Diploblastic animals (e.g. cnidarians) have only which germ layers?✓ Ectoderm and endoderm

Q19. The optic lobe and other parts of the brain are derived from which germ layer?✓ Ectoderm

Q20. In mammals, the functional kidney of the adult is the metanephros, but during embryonic stages the first kidney to appear is the:✓ Pronephros

Q21. All three germ layers (ectoderm, mesoderm, endoderm) of the embryo proper are formed from the:✓ Inner cell mass / epiblast