after two weeks? Select one: Oa. First Three Days After Two Weeks Endometrium Amnion Ob. First Three Days After Two Weeks The mitochondria of the sperm Chorion C. First Three Days After Two Weeks Seminal fluid Amniotic fluid Od. First Three Days After Two Weeks The cytoplasm of the ovum Endometrium
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- Arrange the cytoplasmic rearrangement of the fertilized egg of the tunicate, Styela partita in consecutive order. (I) After sperm entry into the vegetal hemisphere of the oocyte, the yellow cortical cytoplasm and the clear cytoplasm derived from the breakdown of the oocyte nucleus contract vegetally toward the sperm.(II) Before fertilization, yellow cortical cytoplasm surrounds the gray (yolky) inner cytoplasm. (III) The final position of the yellow cytoplasm marks the location where cells give rise to tail muscles.(IV) As the sperm pronucleus migrates animally toward the newly formed egg pronucleus, the yellow and clear cytoplasm move with it.Ovaries secrete the hormone estrogen in greater amounts after menstruationand a few days before ovulation. Among its many effects, estrogen causesthe up-regulation of receptors in the uterus for another hormone secretedby the ovaries, called progesterone. Progesterone, which is secreted afterovulation, prepares the uterine wall for possible implantation of an embryo.Pregnancy cannot occur unless the embryo implants in the uterine wall.Predict the consequence of the ovaries’ secreting too little estrogen.The single uterus (womb) anchors and nourishes the developing fetus. Its walls are composed of 3 layers of tissues, respectively the perimetrium (outer thin cover), the myometrium (thick layer 2 of smooth muscles, which contract to deliver the baby), and the endometrium (inner glandulartissue that lines the internal uterus cavity and undergoes cyclical changes during the menstrual cycle). The uterus lower part is called the cervix and its cavity is called the cervical canal.The oviducts, also called the Fallopian tubes (10-12 cm long), transport the ovocytes released from the ovaries to the uterus by peristalsis. The oviducts are not attached to the ovaries. Instead, the exhibit a funnel-shaped extremity, dubbed the infundibulum, that opens with finger-likeprojections to the ovaries in order to collect the emitted ovocyte. The remaining parts of the Fallopian tubes are named respectively the ampulla (the longest part of a Fallopian tube), and the isthamus(the part of the Fallopian…
- A non-pregnant female's uterus shed its lining (the outer endometrial layer) every 4 weeks and then begins the menstrual cycle anew, the cycle's timing being controlled by female reproductive hormones. A successful pregnancy requires that the menstrual cycle be interrupted and the fetus left undisturbed for 9 months. Cycle interruption is accomplished by the fetal placenta, which secretes several key hormones that manipulates maternal reproductive physiology. Give at least three (3) hormones that control the maternal reproductive physiology, give their specific functions/role.In-vitro fertilization occurs in the laboratory. The resulting embryos remain in a laboratory culture for up to six days before being transferred to the potential mother. If fertilization had occurred naturally (i.e., inside the female reproductive system instead of in-vitro), where would the embryo be and what developmental processes would it be undergoing during those first six days of development?Internal genitalia like the vagina, uterus, and ovaries in females, and the testes, epididymis, and vas deferens in males, originate from the Mullerian and the Wolffian ducts respectively. These two ducts are both present in the same fetus during the early phase of human development, but one will prevail over the other to make the developing conceptus a female or a male. If both persist, the baby will have an intersex condition. Discuss two syndromes that are examples of disorder of sex development (intersex condition), and how they will affect the future life of the newborn
- Labor may begin with rupture of the membranes, experienced either as a sudden gush or as scanty, slow seeping of clear fluid from the vagina. Mrs. Vanessa Narciso, your 30 week pregnant client, was rushed to the emergency room, complaining the she expelled blood tinged mucus 24 hrs ago. She also reports that some twenty minutes ago, a heavy gush of warm liquid suddenly flowed. This was followed by regular, more intense and more painful uterine contractions. Mrs. Narciso also informs you that her BOW has ruptured. Your priority question would be: a. What did the fluid look like? b. How much fluid did you lose from the rupture of your BOW? c. How frequent are your contractions now? d. Was it also accompanied by a bloody show?What is the outer layer of trophoblast termed* Cytotrophoblast Extra-embryonic mesoderm O Syncytiotrophoblast Connecting stalkWhat is the source of different cytoplasmic determinants present in the embryo after fertilization? They are introduced into the cell when the zygote divides They were produced during the process of fertilization. They are within the cytoplasm of the egg cell. They are from the sperm cell.
- There are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Proteins on the sperm plasma membrane bind to ZP3 molecules within the zona pellucida of the egg. Why is this event important? Zona binding triggers the acrosome reaction, in which the sperm plasma membrane fuses with the outer acrosomal membrane, causing exocytosis of acrosomal contents. What is in the "acrosomal content"? Acrosomal enzymes begin to dissolve a hole in the zona pellucida. This enzymatic degradation, accompanied by rapid sperm tail beating, moves the sperm through the zona. Where does the sperm intend to reach?ARRANGE THE FOLLOWING EVENTS IN CORRECT SEQUENCE from 1-13: Penetration of the zona pellucida Cortical reaction 1st cleavage Acrosomal membranes rupture, and release their enzyme contents Penetration of the corona radiata Depolarization of egg membranes Migration of cortical cytoplasm to form gray crescent Sperm attach loosely on the zona pellucida Zona reaction Oocyte completes meiotic division ZP3 tenaciously binds acrosome-intact sperm Release of Ca+2 in egg cytoplasm from its bound state AmphimixisThe zygote is described as totipotent because itultimately gives rise to all the cells in your body includingthe highly specialized cells of your nervous system.Describe this transition, discussing the steps and processesthat lead to these specialized cells.