Bio 268 - Third Exam 1. Which luyer of the epidermis contains dividing cells? 9.
ID: 273090 • Letter: B
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Bio 268 - Third Exam 1. Which luyer of the epidermis contains dividing cells? 9. Which of the following statements about somite a basal layer b. granular layer differentiation is true? a. Wnt signals from the epidermis induce the selerotome. b. The dermomyotome generates the ribs. c. The dermomyotome generates the vertebrae d. Shh signals from the floor plate and the notochord comified layer e all of the above 2. The epidermis is originally induced by signals. induce the sclerotome. e. The sclerotome forms dorsal skeletal muscle. a. noggin b. chordin c. BMP d. follistatin e. nodal 10. The intervertebral discs develop in part from a. the cephalic neural crest. b. the endoderm of the pharynx. c. the rhombencephalorn. d. the intermediate mesoderm. e. the notochord. 3. accumulates in the differentiating cells that migrate to the outer layers of the epidermis. a. notch b. laminin c. keratin d. collagen e. integrin 11. The pronephric duct develops a. only from the head mesoderm. b. starting at the anterior border of expression of Hoxb4 c. from somitic mesoderm cells expressing MyoD. d. from the notochord e. from the neural tube. 4. Which of the following types of mesoderm is not found in the trunk of an embryo? b. somitic mesoderm d. head mesenchyme 12. Which of the following develops from the intermediate mesoderm? a. heart b. reproductive ducts c, dermis of the back d. limb muscle e. intervertebral discs e. lateral plate mesoderm 5. Which of the following develops from the somites? a. blood cells 13. The heart develops from a. the cephalic neural crest b. the rhombencephalon. c. the endoderm of the pharynx. d. the lateral plate mesoderm. e. the somites. b, vertebrae e muscles of the face d. reproductive duets e, cardiac muscle 6. The dermis of the dorsal skin develops from a. the myotome of the somites. b. the trunk neural crest. 14. Which of the following statements about human heart of the somites development is true? a. After birth, a foramen that communicates right and d. the epidermal ectoderm. e. the sclerotome of the somites left ventricles will open b. The heart develops from cells of the notochord. c. The heart is the first functioning organ of the Mamy dorsal muscles of the trunk develop from sclerotome of the somites. myotome of the somites. dermatome of the somites. d. The heart starts to beat after birth. e. All of the above statements are true. scral neural crest the notochord 15. The coelom develops inside themesoderm Theof the somite form the dermomyotome, which becomes the a. head b. notochored c. somitic d. intermediate e. lateral plate a dorsal-lateral cells; dermis and skeletal muscle b ventral-medial cells; spinal cord c center cells; intervertebral discs d. surface cells, ribs e. anterior cells; heart Page I of 3Explanation / Answer
1) Basal Layer.Cells divides in the basal layer and the cells after dividing move above.Single layer of cells are present in basal layer which is present on the basement membrane.
2)BMP.Bone morphogenetic protein.It causes the differentiation of ectoderm.
3) Keratin.
4) Intermediate mesoderm give rise to excretory system.
5) Vertebrae of the vertrebal column, rib cage.
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