Bio 268-Third Eum Which of the following actions would induce a mirror 35. When
ID: 273092 • Letter: B
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Bio 268-Third Eum Which of the following actions would induce a mirror 35. When cells enter through the primitive streak, they image duplication of the digits of a wing bud? differentiate into endoderm if they express the a. Removing the early apical ectodermal ridge (AER) transcription factor b. Implanting genetically modified fibroblasts that a. Hoxbi c. Thx e. p-catenin produce sonic hedgehog (Shh) on the anterior side of b. Hoxc6 an carly wing bud. c. Replacing the early wing AER with a late wing AER d. Sox17 d. Replacing the late wing progress zone (PZ) with an early wing PZ 36. The oral cavity is lined with cells. e. Replacing the late wing PZ with a late leg PZ a. ectodermal b. mesodermal c. endodermal d. mesenchymal e. apopeotic 29. Which of the following would induce the formation of distal structures next to the shoulder in a wing bud? a. Removing the early apical ectodermal ridge (AER) b. Transplanting an extra zone of polarizing activity c. Replacing the carly wing progress zone (P2) with a d. Replacing the early wing AER with a late wing AER. a tonsils (ZPA) to the anterior side of an early wing bud. late wing PZ 37. Which of the following structures does nos develop from pharyngeal pouches? b. middle ear and Eustachian tubes c. parathyroid glands d. thymus e. liver e. Replacing the early wing PZ with an early leg PZ 30. Knockout mice without Wnt7a or without Lim Limx/b) develop a. extra limbs. b. footpads on both sides of their paws c. a mirror-image duplication of the digits d. missing proximal structures of the limb. c. missing limbs. 38. The endoderm of the foregut that is posterior to the stomach forms buds that become a the gallbladder and its dact. b. the glandular epithelium of the liver c. the dorsal lobe of the pancreas. d. the ventral lobe of the pancreas 31. The spaces between the digits are formed by e. All of the above. a. cell migration b. cell death c. ingression d. invagination 39. The lary ngotracheal pouch grows from the and forms the lining of the a. small intestine. liver. b. stomach pancreas. c. colon gall bladder d. oral cavity... nasal cavity e. cell proliferation 32. A function of the embryonic endoderm is to a. induce the differentiation of the heart mesoderm pharyn... respiratory system 40. Maternal macrophages that migrate from the amniotic h. induce the differentiation of the notochord. c. form the lining of the digestive tube. d. form the pharyngeal pouches. fluid to the uterine musck, where they induce contractions and birth, are activated by Insulin from the pancreas e. All of the above are functions of the endoderm. 33. Which of the following develops from the endoderm? a. dermis b. Albumin from the liver c. Mucus from the trachca d. Surfactant A from the embryonic lung. b. melanocytes c. blood cells d. limb skeleton Amylase from the saliva e pancreas 34. The visceral endoderm becomes a. extraembryonic (yolk sac) b. the pharynx c. the alveoli d. the heart e. the coelom Page 3 of 3Explanation / Answer
Q36) The oral mucosa is the mucous membrane lining the inside of the mouth and consists of stratified squamous epitheliumtermed oral epithelium and an underlying connective tissue termed lamina propria. The oral cavity has sometimes been described as a mirror that reflects the health of the individua
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