DEN-020-C3-P1-Long-Exam.pdf

DEN 020 C3 P1 Long Exam Total points 91/100 Instruction: Choose the most appropriate answer. The respondent's email ([email protected]) was recorded on submission of this form. Neural crest cells differentiate from this particular germ lay...

DEN 020 C3 P1 Long Exam Total points 91/100 Instruction: Choose the most appropriate answer. The respondent's email ([email protected]) was recorded on submission of this form. Neural crest cells differentiate from this particular germ layer. What is this *0/2 germ layer? ectoderm neuroectoderm mesoderm endoderm What is a zygote? It is the ___ product of fertilization. * 2/2 2nd polar body single cell 2 cell solid ball of cell Identify the organelles of the cell based on its description. * rough smooth  endoplasmic microsomes lysosomes centrioles endoplasmic Score reticula reticula These are membranes appearing as profusely anastomosing 2/2 tubules; abundant in cells that synthesize steroids. These membrane bound vesicles 2/2 contain a variety of lytic enzymes. These are not actual organelles but are small artiHcially 2/2 fragmented particles of rough endoplamic reticula. These are pair of short, cylindrical, tubular structures; serve as points of 2/2 origin and conversion for spindle microtubules  during mitosis. These are membranous vesicles; continuous with the nuclear envelope on 2/2 which ribosomes are attached; site of protein synthesis for export out of the cell. The philtrum of the upper lip is formed largely by the globular process which is *2/2 formed by the merger of the following facial processes: maxillary processes medial nasal processes lateral nasal processes mandibular processes The primary palate is the first structure that will separate the nasal cavity from *2/2 the oral cavity. In later development, this structure will NOT arise from it: incisive papilla anterior upper lip four maxillary incisors two maxillary canines Neural crest cells are enclosed by the ectoderm at the time of neural tube *2/2 formation. Following migration of these cells they do NOT differentiate into: 1. Schwann cells 2. Melanocytes 3. ganglion cells 4. costal chondroblasts 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct only 4 is correct If the medial nasal processes do not fuse completely, which of these *0/2 structures will be poorly formed or absent? nasal septum secondary palate primary palate nasal ala The philtrum of the upper lip is formed largely by the globular process which is *2/2 formed by the merger of the following facial processes: maxillary processes medial nasal processes lateral nasal processes mandibular processes FILL ME UP! At around day eight of _1_, the cells of the embryoblast will * differentiate into the _2_. During the third week of development, the embryo enters the period of _3_ during which the three germ or embryonic layers are formed namely: the _4_ (the surface layer), the mesoderm (the middle layer) and the _5_ (inner layer) to form the trilaminar disk. What is number? bilaminar ectoderm gastrulation endoderm gestation Score disk 1 2/2 2 2/2 3 2/2 4 2/2 5 2/2 Which of the following statements do NOT refer to the developmental *2/2 processes that occur in the embryo during the embryonic period? interaction between embryonic cells controlled cellular growth and accumulation of byproducts change in identical embryonic cells to attain distinct structure and function attainment of primitive function and size due to proliferation and differentiation This layer of the blastocyst will give rise to the future embryo: 1. Trophoblast *2/2 2. Embryoblast 3. outer cell mass 4. inner cell mass 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct only 4 is correct These structures will arise from the lateral nasal processes. * 2/2 bridge of the nose nasal ala philtrum of the upper lip nasal septum Which of the following statements is NOT true about the fetal period? * TRUE NOT TRUE Score It is a period of maturation of existing structures 2/2 as the embryo becomes the fetus. Changes in the fetus are very dramatic 2/2 and organs are not allowed to function. Physiologic processes of maturation of the 2/2 individual tissues and organs take place. The endoderm divides into the 0/2 foregut, midgut and hindgut. A cleft along the left lacrimal area of the face running along the sides of the *2/2 nose and into the left side of the lip is due to the failure of these processes to fuse: maxillary and lateral nasal processes medial nasal and maxillary processes lateral nasal and mandibular processes mandibular and medial nasal processes FILL ME UP! After fertilization, human development will involve a phase of rapid * _1_ and migration of cells that will lead to the formation of a solid ball of cells known as the _2_. Fluid accumulates and the cells realign to form a fluid filled hollow ball known as the _3_. Two cell populations can now be distinguished, the _4_ that lines the primary yolk sac and the _5_ that will form the future embryo. What is number? blastocyst trophoblast embryoblast morula proliferation Score 1 2/2 2 2/2 3 2/2 4 2/2 5 2/2 What are these organelles that are capable of transforming chemical energy of *2/2 metabolites into readily available energy of the cell? ribosomes mitochondria lysosomes cell membrane The body of the tongue is primarily formed by the ___. * 2/2 tuberculum impar hypobranchial eminence mandibular arch lateral lingual swellings Which of the future nerves and muscles are derived from the mandibular * processes? YES NO Score trigeminal nerve 2/2 stapedius muscle 2/2 muscles of 2/2 mastication glossopharyngeal 2/2 nerve Which of the following statements about the fetal mandible is correct? * 2/2 the body of the mandible develops lateral to the Meckel’s cartilage the sympheseal cartilage is present prior to any ossiHcation of the mandible the two mandibular halves are united at the symphysis during fetal life the Meckel’s cartilage forms the great part of the mandible Which of the following statements refer to the developmental processes that * occur in the embryo during the embryonic period? True False Score The interaction between embryonic 2/2 cells take place during this period. Primitive function and size due to proliferation and 2/2 differentiation is attained. There is the change in identical embryonic cells to 2/2 attain distinct structure and function. There is controlled cellular growth and 2/2 accumulation of by- products. During the development of the tongue, this structure will be incorporated into *0/2 its structure. Lateral lingual swellings epiglottis Tuberculum impar of His Thyroid gland The palatal shelves or the palatine processes which will form the secondary *2/2 palate: 1. develop in a vertical direction alongside the tongue during the late 4th week 2. move up into a horizontal direction direction as the tongue moves out of the way 3. fuse with the inferior edge of the nasal septum 4. undergo merger in all aspects at the same time 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct only 4 is correct A newborn baby was found to have a right unilateral cleft lip running upwards *2/2 towards the nasal cavity. What facial primordia did NOT fuse completely during development resulting to the cleft? the two mandibular processes maxillary and mandibular processes the two medial nasal processes medial and lateral nasal processes The following structures are derived from the neural crest cells: 1. branchial *2/2 arch arteries 2. branchial arch cartilages 3. branchiomeric nerves 4. dental papilla 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct only 4 is correct The oropharyngeal or buccopharyngeal membrane, located between the *2/2 embryonic oral cavity and foregut is a structure consisting of: ectoderm and mesoderm endoderm and mesoderm ectoderm and endoderm neuroectoderm and neural crest cells What are these organelles described as membrane bound and vesicle shaped *2/2 containing a variety of lytic enzymes? ribosomes mitochondria lysosomes cell membrane Which adult structure do not form from the mesoderm? * 2/2 dermis cartilage melanin muscle Which of the following statements is NOT true about the fetal period? * True False Score It is the period of maturation of existing structures 1/1 as the embryo becomes the fetus. Changes in the fetus are very dramatic 1/1 and organs are not allowed to function. Maturation of physiologic processes of 1/1 individual tissues and organs take place. The endoderm divides into the foregut, midgut and 0/1 hindgut during development. This form was created inside of Phinma Education. Report Abuse Forms