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…

Phlebotomy Essentials

6th Edition

ISBN:9781451194524

Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Chapter1: Phlebotomy: Past And Present And The Healthcare Setting

Section: Chapter Questions

Problem 1SRQ

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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.
Caitlyn had unprotected sex with her fiancé about 2 weeksafter her last period, and is worried that she might have becomepregnant. She asks her physician if there are times during hermonthly menstrual cycle when she might be more likely tobecome pregnant. She also asks how birth control pills preventa woman from becoming pregnant. What will the physician tellCaitlyn?
25.In pregnancy, the stretch of the cervix stimulates the hypothalamus to release a hormone. As the cervix and uterus continue to be distended, more of the hormone is released. In addition, this causes an increased responsiveness of the uterine smooth muscle.
Birth control pills commonly provide excess progesterone that serves to inhibit (suppress) the actions of FSH and LH through a negative feedback loop. Given the role these hormones (FSH and LH) play, how could this feedback loop prevent a woman from becoming pregnant?
''In the early cleavage stages, when the embryocannot yet feed, the developmental program is driven andcontrolled entirely by the material deposited in the egg bythe mother.'' Explain why or why not.
A variety of fertility tests are available for women to purchase overthe counter—for example, at drugstores. Because more women nowdelay their first pregnancy until they are older, these tests arebecoming more popular. Many of these tests incorporate antibodiesthat specifically react with hormones found in a woman’s urine.What specific hormones could be measured in these tests, and howmight these tests actually work?
Reproductive physiology (human) a) At the time of ovulation, the released ovum (egg) has completed both meiosis I and meiosis II. b) Because the corpus luteum (CL) is rescued from atresia by hCG early in pregnancy, the CL continues to produce progesterone throughout the 9 months of a normal pregnancy. c) Late in the follicular phase, estrogen participates in a positive feedback loop that leads to a surge in luteinizing hormone and ovulation. d) Both (a) and (b) are correct and (c) is incorrect e) Statements (a), (b) and (c) are all correct
1. Roseann is scheduled for augmentation of labor with oxytocin. What factors would you ensure are in place before augmentation is begun? 2. The baby of Mrs. P is in occipito posterior position. She is experiencing severe back pain. What actions could her husband take to help relieve his wife’s pain caused by this posterior fetal position? 3. After rupture of the mother’s membranes, the fetal monitor shows variable decelerations. On inspection, you are able to see the umbilical cord at the vaginal opening. You are aware that this is a fetal emergency. In order of priority, what would be your best actions? You can include evidence based practices. Include your resources.
What are the cells producedin the first stage of theembryonic developmentcalled?
Describe the role of pregnancy hormones during human pregnancy. What hormones prepare the mammary glands for lactation and what hormones continue to be important during this process?
1. 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.
Concerning events duringthe periods of life howdifferent is the gametogenesisin women and in men?

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