Human Anatomy
9th Edition
ISBN: 9780135168059
Author: Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon
Publisher: Pearson Education, Inc.,
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Textbook Question
Chapter 25, Problem 20CYU
In addition to nourishing the developing fetus, the placenta also functions as an endocrine organ. What hormones does the placenta produce?
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In addition to its role in the nutrition of the fetus, what are the primary endocrine functions of the placenta?
The hormone-secreting layer of the placental barrier is (a) the extraembryonic mesoderm, (b) the lacunae, (c) endothelium, (d) cytotrophoblast, (e) syncytiotrophoblast.
What hormones does the placenta produce?
Chapter 25 Solutions
Human Anatomy
Ch. 25 - Where are interstitial cells located? What is...Ch. 25 - Distinguish the tunica albuginea from the tunica...Ch. 25 - What is meant by the phrase "sperm mature in the...Ch. 25 - Where is the ejaculatory duct located?Ch. 25 - Which pair of accessory glands produces the...Ch. 25 - Which erectile tissue does the urethra pass...Ch. 25 - How many spermatids are formed from each primary...Ch. 25 - What roles do sustentocytes play in sperm...Ch. 25 - What are the components of the head of the sperm?...Ch. 25 - What type of tissue lines the uterine tubes? How...
Ch. 25 - Name the peritoneal supports of the female...Ch. 25 - Describe the location of each of the following...Ch. 25 - What are the male homologues of the following...Ch. 25 - Which hormone stimulates follicle development in...Ch. 25 - During which period of a female’s life do stem...Ch. 25 - What is the corpus luteum, and what role does it...Ch. 25 - When does the glandular portion of the breast...Ch. 25 - What prevents more than one sperm from fertilizing...Ch. 25 - What part of the placenta is formed from maternal...Ch. 25 - In addition to nourishing the developing fetus,...Ch. 25 - What type of screening is most common for each...Ch. 25 - What do the embryonic mesonephric ducts form in a...Ch. 25 - What are secondary sex characteristics in males...Ch. 25 - Which of the following statements about the female...Ch. 25 - For each of the following hollow organs; choose...Ch. 25 - Which of the following structures produces the...Ch. 25 - The uterine cycle can be divided into three...Ch. 25 - Prob. 5RQCh. 25 - The hormone-secreting layer of the placental...Ch. 25 - The function of the stereocilia in the duct of the...Ch. 25 - The broad ligament of the uterus in the female...Ch. 25 - The embryonic paramesonephric duct gives rise to...Ch. 25 - Which of the following statements about the...Ch. 25 - If the uterine tube is a trumpet ("salpinx"), what...Ch. 25 - The myometrium is the muscular layer of the...Ch. 25 - What occurs during the proliferative phase of the...Ch. 25 - Which cells in the ovaries secrete hormones? (a)...Ch. 25 - Prob. 15RQCh. 25 - The hormones that stimulate the ovarian cycle are...Ch. 25 - Sustentocytes (a) nourish spermatocytes and....Ch. 25 - Match the embryonic structures listed in column B...Ch. 25 - Why would a radical mastectomy affect ability to...Ch. 25 - Based on what you know about the sources of semen,...Ch. 25 - A 68-year-old man who has trouble urinating is...Ch. 25 - Gina gave birth to six children. During an...Ch. 25 - Why do doctors often recommend that men not wear...Ch. 25 - Explain how a woman with an ovary removed from one...Ch. 25 - In severe cases of endometriosis, endometrial...Ch. 25 - Name three sets of arteries that must be...
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- Which hormones are secreated by the placenta to maintain pregnancy?arrow_forwardName one female sex hormone which is maintained at high levels throughout pregnancy. State two important functions of the hormone in pregnant women.arrow_forwardIn menstruation, the functional layer is shed from the endometrium. Explain the hormonal and physical factors responsible for this shedding. (See Figure 25.19.)arrow_forward
- After birth, there is production and secretion of milk from the mother'smammary glands.a) Discuss the similarities and differences observed in the stages ofdevelopment of the adult breast tissue, specifically from the nonpregnant, to the pregnant and finally to the lactating stage.b) Why is it normally only after birth that lactogenesis occurs?arrow_forwardWhen would the LH surge begin? When would Anita have her highest levels of progesterone? When would Anita's progesterone start declining? What is the major cause of the LH surge?arrow_forwardExplain how the three germ layers are involved in forming the extra-embryonic membranes, and discuss the importance of the placenta as an endocrine organ.arrow_forward
- Which hormone is inhibited during pregnancy in order to prevent contractions of the uterus? Which two hormones promote thickening of the endometrium? Progesterone and estrog If GnRH production were blocked, what will happen? What would happen if testosterone levels get too high?arrow_forwardWhy does continued breastfeeding decrease the chance of pregnancy? (Hint: Think about the effect the breastfeeding hormones have on estrogens and progesterone.)?arrow_forwardIdentify the most important hormones produced by the testes and ovaries, name the hormones produced by the placenta, and state functions of each hormone.arrow_forward
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