Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 27, Problem 17RQ
What controls whether an embryo will develop testes or ovaries?
- pituitary gland
- hypothalamus
- Y chromosome
- presence or absence of estrogen
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Within what structure will a fertilized egg implant and start developing?
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blood levels of estrogen and progesterone increase
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Which of the following describes the role of Luteinizing hormone in the ovarian cycle?
o Inhibits the hypothalamus from secreting GNRH
o Directly promotes thickening of the endometrium
o Simulates the ovary to increase aldosterone
o Induces the corpus luteum to secrete progesterone
Stimulates lactation in the mammary glands
Chapter 27 Solutions
Anatomy & Physiology
Ch. 27 - Watch this video...Ch. 27 - Watch this video...Ch. 27 - Watch this video...Ch. 27 - Watch this series of videos...Ch. 27 - A babys gender is determined at conception, and...Ch. 27 - What are male gametes called? ova sperm testes...Ch. 27 - Leydig cells ________. secrete testosterone...Ch. 27 - Which hypothalamic hormone contributes to the...Ch. 27 - What is the function of the epididymis? sperm...Ch. 27 - Spermatogenesis takes place in the ________....
Ch. 27 - What are the female gonads called? oocytes ova...Ch. 27 - When do the oogonia undergo mitosis? before birth....Ch. 27 - From what structure does the corpus luteum...Ch. 27 - Where does fertilization of the egg by the sperm...Ch. 27 - Why do estrogen levels fall after menopause? The...Ch. 27 - The vulva includes the ____________. lactiferous...Ch. 27 - What controls whether an embryo will develop...Ch. 27 - Without SRY expression, an embryo will develop...Ch. 27 - The timing of puberty can be influenced by which...Ch. 27 - Briefly explain why mature gametes carry only one...Ch. 27 - What special features are evident in sperm cells...Ch. 27 - What do each of the three male accessory glands...Ch. 27 - Describe how penile erection occurs.Ch. 27 - While anabolic steroids (synthetic testosterone)...Ch. 27 - Follow the path of ejaculated sperm from the...Ch. 27 - Identify some differences between meiosis in men...Ch. 27 - Explain the hormonal regulation of the phases of...Ch. 27 - Endometriosis is a disorder in which endometrial...Ch. 27 - Identify the changes in sensitivity that occur in...Ch. 27 - Explain how the internal female and male...Ch. 27 - Explain what would occur during fetal development...
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- How Is Sex Determined? The absence of a Y chromosome in an early embryo causes the: a. embryonic testis to become an ovary b. Wolffian duct system to develop c. Mllerian duct system to degenerate d. indifferent gonad to become an ovary e. indifferent gonad to become a testisarrow_forwardWhich of the following are hormones that influence puberty? Select all that apply. Relaxin Luteinizing hormone O Prostaglandin Testosterone Follicle-stimulating hormonearrow_forwardPuberty in females begins with the first menstrual cycle the development of breasts an increase in GnRH increased estrogen from follicular development the completion of meiosis in oogenesisarrow_forward
- Which of the following mechanisms best explains the contraceptive effect of birth control pills that contain both synthetic estrogen and progestin? Inhibition of ovulation Impairment of implantation hyperplastic changes of the endometrium Production of uterine secretions that are toxic to developing embryos Impairment of sperm transport due to uterotubal obstruction Direct inhibition of oocyte maturationarrow_forwardWhich of the following is true about Organogenesis? Choose all possible answers. anterior pituitary gland releases FSH and LH that drives ovarian development is the process by which mature female gametes, or ova, develop from germ cells. begins at puberty LH surge causes the oocyte to mature. After the secondary oocyte is released from the ovary, meiosis is completed.arrow_forwardWhat means to retain the ability to become any cell type—including germ-line cells and gametes—when exposed to the appropriate signals in a developing embryo?arrow_forward
- as possible, because a In oogenesis it is important to produce an egg with as much fertilized egg must repeatedly and produce numerous daughter cells.arrow_forwardWhat is the most common cell type found around follicular cells? Zona pellucida Primordial cells Unilaminar cells Basal cells Interstitial cellsarrow_forwardWhich pituitary hormone might contribute to multiple births and why? Which pituitary hormone might contribute to multiple births and why? Luteinizing hormone stimulates ovulation. Ovulation of more than one egg cell per cycle can result in the formation of multiple embryos. Follicle-stimulating hormone stimulates follicle maturation allowing more than one egg cell to develop during one cycle. Oxytocin promotes uterine contractions necessary to deliver multiple babies. Prolactin stimulates milk production to support multiple births.arrow_forward
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