1). 28. While the initial release of oxytocin, the hormone that triggers the onset of childbirth, is not fullyunderstood, scientists do know that high levels of the hormone estrogen lead to the formation of receptorsfor the oxytocin on the uterus late in pregnancy. Oxytocin causes the uterus to contract, and uterinecontractions stimulate the pituitary gland to release more oxytocin. Which statement best explains howthe uterus and the pituitary gland work together during childbirth?a. Uterine contractions signal the pituitary gland to release more oxytocin via a negative feedbackloop, which causes the frequency and intensity of uterine contractions to be maintained at aconstant rate until birth occurs.b. Uterine contractions cause the pituitary gland to release oxytocin via a negative feedback loop,which increases the frequency and intensity of uterine contractions until birth occurs.c. Oxytocin causes uterine contractions, which cause the pituitary gland to secrete more oxytocinand cause more uterine contractions via a positive feedback loop, which increases thefrequency and intensity of the contractions until birth occurs.d. Oxytocin is released only in response to uterine contractions via a positive feedback loop, whichcauses the frequency and intensity of uterine contractions to be consistent until birth occurs.

Oxytocin is a peptide hormone that is produced by the hypothalamus and stored in the posterior…

Answered: nderstood, scientists do know that high…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter49: Animal Reproduction

Section: Chapter Questions

Problem 7TYK

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Similar questions

A babys gender is determined at conception, and the different genitalia of male and female fetuses develop from the same tissues in the embryo. View this animation (http://openstaxcollege.org/l/fetus) that compares the development of structures of the female and male reproductive systems in a growing fetus. Where are the testes located for most of gestational time?
What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? Tire cells would not continue to divide. Tire corpus luteum would continue to produce progesterone and estrogen. Menses would flush the blastocyst out of the uterus. Tire uterine mucosa would not envelop the blastocyst.
How does the decrease in progesterone at the last weeks of pregnancy help to bling on labor? stimulating FSH production decreasing the levels of estrogens dilating the cervix decreasing the inhibition of uterine contractility
The function of the placental hormone human placental lactogen (hPL) is to ________. prepare the breasts for lactation nourish the placenta regulate the menstrual cycle all of the above
If an embryo splits at the two-cell stage, each of the resulting identical twins will have its own placenta. If such a split occurs near the time of implantation, the identical twins may shale a placenta. By contrast, fraternal twins never share placenta. Explain this difference between the two types of twins.
39. A pregnant woman in substantial pain called her doctor and explained (between sobs) that she was about to have her baby “right away.” The doctor calmed her and asked how she had come to that conclusion. She said that her water had broken and that her husband could see the baby’s head. (a) Was she right to believe that birth was imminent? If so, what stage of labor was she in? (b) Do you think she had time to make it to the hospital 60 miles away? Why or why not?
7) List 2 processes that the placenta takes over by the end of the first trimester in humans.
41.A55-year-old womanhasaneoplasmoftheanterior bodyofthe uterus.Which of the following structures is most likely to be affected first by contiguous spread of the neoplasm? O A) Bladder B) Fallopian tube C) Ovary D) Rectum E) Sigmoid colon
1) The two hormones produced by the ovaries that help regulate the female reproductive cycle are ____?_______ and _____?______
4. What is the major control centers of oogenesis that secretes ecdysone?A. headB. fat bodiesC. ovariesD. corpora allata 5. Which of the following does not pertain to the panoistic ovarioles?A. Trophocyte and oocyte originate from a single oogonium.B. Most primitive type of ovarioles and absence of trophocytes.C. Each developing oocyte is surrounded by the follicular epithelium. D. Follicular plug exists between adjacent oocyte.
1. Why are the accessory glands of the male so important in reproduction?and Why doesn't women menstruate while she is pregnant?
1. Discuss hormonal regulations in gametogenesis of males and females.

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