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3. After ovulation, the following cells are transformed to lutein cells EXCEPT *
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- 1. Which of the following layers protect the mammalian oocyte during ovulation? * a. cortical and hyaline layers. b. vitelline envelope and jelly coat. c. granulosa cells and zona radiata. d. corona radiata and zona pellucida. 2. After ovulation, the following cells are transformed to lutein cells EXCEPT *a. theca cells.b. corona radiata cells.c. cumulus oophorus cells.d. stratum granulosum cells. 3. Which of the following justifies the expansion of the allantois in shelled amniotes? * a. It stores excretory wastes of the embryo. b. It can be accommodated by the coelom c. It forms allantoic vessels for gas exchange. d. It protects the embryo from mechanical stress.Which of the following stages of the fertilization process stimulates completion of meiosis II in the oocyte’s nucleus? A. The sperm nucleus and egg nucleus combine to form the genetic material of the zygote B. Sperm release enzymes to digest the protein layer of the secondary oocyte C. The entry of a sperm into the secondary oocyte D. The swimming of sperm from the vagina, through the uterus, and up to an oviductGastrulation... A. Is a specialized form of cell division that partitions the cytoplasm of a fertilized egg B. Refers to the fusion of haploid gametes to give a diploid zygote C. Produces an embryo with either two or three distinct cell layers D. Is a developmental stage consisting of a cell layer surrounding a fluid-filled space E. None of the above
- An individual has the chromosomal makeup XX and sexual differentiation proceeds normally. Which of the following would be the case? a. Mullerian ducts will degenerate b. Estrogen promotes development of the vagina c. Anti-Mullerian hormone is present d. Wolffian ducts will develop e. There will be no formation of fetal testesWhich of the following statements is/are true? A. Spermatogenesis is an example of asymmetric cell division. B. The formation of a mature egg occurs through symmetric cell division. C. Spermatogenesis and oogenesis are both examples of asymmetric cell division. D. Spermatogenesis involves only symmetric cell division whereas oogenesis involves asymmetric cell division.A chemical that prevents acrosomal proteins from interacting with proteins on the egg membrane would have which of the following immediate effects (i.e. which would happen first)? Group of answer choices A. Prevention of the fast block B.) Prevention of sperm recognition C.) Explosion of the egg into millions of tiny pieces D. Prevention of polyspermy E. Prevention of the slow block
- Which of the following is not true about neurulation? Choose all possible answers. a. Segregation of neural ectodermal rudiment from the epidermal ectoderm. b. In primary neurulation, the neural plate thickens along its midline into a solid cord of cells that is displaced internally and cavitates to form a hollow tube. c. In secondary neurulation, the neural plate folds along the anterior-posterior axis of the embryo, forming a tube that detaches from, and is displaced under, the epidermal ectoderm. d. Ectoderm forms the neural tube e. Mesoderm forms the reproductive organs f. Endoderm forms the gut g. All are true about neurulationWhich of the following statements does NOT correctly describe the events following fertilization? Select one: a. Only the inner cell mass cells in a blastocyst are pluripotent. b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding. c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican. d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body.Which of the following is TRUE about neurulation? (Check all that apply) A The detail mechanism varies slightly be species. It involves some of the morphogenetic movements that also operate in gastrulation. C It corresponds to the physical and functional segregation of the neural tube into brain and spinal cord. D It proceeds in a posterior to anterior order. It overlaps in time with gastrulation. F Depending on the cellular processes involved, neurulation can be regarded as primary, secondary or tertiary. It corresponds to the physical and functional segregation of the ectoderm into epidermis, neural tube and neural crest. It is the segmentation of the mesoderm into somites. It is the segregation of early embryonic cells into the three germ layers: ectoderm, mesoderm and endoderm. It is the segregation of mesodermal cells into myogenic lineage and skeletogenic lineage. E Feedback That's not correct
- During gastrulation, cells from the _____ layer of the bilaminar germinal disc migrate and form the three primary germ layers. a. notochord b. hypoblast c. epiblast d. mesoblasta. The ovaries produce secondary the female sex cells. b. Stem cells, called divide by to produce primary each form part of a c. At the onset of puberty, tens of thousands of ovaries. Between menarche and menopause, each primordial follicle develops into a in the and its primary oocyte completes d. Some primary oocytes become 23-chromosome cells that begin then pause. secondary oocyte is released into is completed when e. Each month, the uterine tube. the oocyte isMatch the germ layer on the right with its contribution to the tissues and organs of the embryo, on the left. v connective tissue stroma A. mesoderm v parenchymal cells, e.g., liver B. ectoderm C. mesoderm D. mesoderm E. endoderm F. endoderm vasculature v innervation v epithelium of enteric secretory duct tubes v epithelium of integumentary system G. ectoderm v elastic membrane