mcb135E-fa06-mt1-Timiras-exam

mcb135E-fa06-mt1-Timiras-exam - Physiology Name: SID: o f H...

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Unformatted text preview: Physiology Name: SID: o f H u m a n D e v e l o p m e n t ( M C B 1 3 5 E ) MIDTERM 1 october 4, 2006 N a m e : S I D : Points Received N4ultiple Choice (30 points) True and False (20 points) Part lll: Short Answer (50 points) .41 S C O R E t4V +8 ( 6 * r Name: SID: Physiology of Human Development Midterm I October 4. 2006. l. Multiple choice auestions (30 points, 2 points each correct answer) There is only one correct answer. 1 . Which of the following statements on Growth and Development are correct? A. Growth and development continue throughout the lifespan B. GroMh and development follow a precise, predictable timetabre C. crowth and development can be influenced by both genetic and environmental factors D. All of the above are correct E. None of the above are correct 2. Fertilization occurs: A. In the ovary B. In the section of the oviduct. close to the ovarv C. In the section of the oviduct, close to the uterus D. In the uterus E. In the corpus luteum 3. Sperm and ovum have several characteristics dltferent from each other. Indicate fhe characteristic that is the same for both of them: A. At fertilization, each gamete has a haploid number of chromosomes B. At the moment of fertilization, the sperm is a very small cell C. After puberty sperm production continues throughout life D. Maturation of sperm and ovum depends on estrogens E. At the moment of fertilization, the ovum is a very large cell 4. The results of fertilization, include A. Association of male and female chromosomes B. Determination of the sex of the new individual C. Activation of the ovum into meiotic cell division D. Reestablishment of the diploid number of chromosomes E. All of the above are correcl Name: SID: 5. At implantation, the mother provides: A. A hyperplastic/hypertrophic uterine mucosa under the influence of high gstrogen levels from the corpus luteum of the maternal ovary iB. A hyperhemic /hypervascularized uterine mucosa under t-he influence of hiqh levels of progesterone from the corpus luteum of the maternal ovary The embrvo provides: C. hCG from the trophoblast (or chorion) to keep the corpus luteum of the maternal ovary to produce high levels of estrogens and progesterone D. From the trophoblast, a number of enzymes (proteinases) and proteins (adhesions molecules) that facilitate trophoblast invasion E. All of the above is correct 6. Male sex differentiation depends on: A. The presence of,gene(s) (SRY gene) in the y chromosome. These genes are responsible for the production of molecules capable of inducing differentiation of the bipotential, undifferentiated gonad into a testis B. The testis starts to secrete testosterone that induces the differentiation of the Wolffian ducts into male secondary sex organs C. The development of the enzyme S-alpha reductase promotes the production of dehydrotesterone (DHT) that induces differentiation of the external genitalia into the male type D. The Mullerian ducts regress via the action of the l,4ullerian lnhibitorv Substance...
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mcb135E-fa06-mt1-Timiras-exam - Physiology Name: SID: o f H...

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