Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 46.4, Problem 3CC
WHAT IF? → If a human female begins taking estradiol and progesterone immediately after the Start of a new menstrual cyele, how will ovulation be affected? Explain.
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. Describe the pre- and post- ovulation events of the menstrual cycle. How is menstruation prevented if pregnancyoccurs?
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- WHAT IF? If a sperm nucleus is injected into an oocyte,what steps of gametogenesis and conception arebypassed?arrow_forwardDescribe the female monthly cycle. What happens in the ovary and uterus at the different stages of the cycle, which hormones guide those events and where are those hormones secreted?arrow_forwardL23. Act. 4– Draw arrows on the diagrams below to trace the journey of sperm from the site of spermatogenesis in the testes to the point of fertilization in the female reproductive tract. List the organs and structures that the sperm travels through below the diagrams. List the organs the sperm travels through from the testes until it leaves the male reproductive tract.arrow_forward
- 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 contractilityarrow_forwardwhat does a menstrual cycle concept map with 10 words or phrases look like?arrow_forwardUnderstanding the causes of infertility can be valuablein developing new birth control methods. Cite a type ofcontraceptive based on each of the following causes of infertility:(a) failure to ovulate due to a hormonal imbalance;(b) a large fibroid tumor that disturbs the uterine lining;(c) endometrial tissue blocking uterine tubes;(d) low sperm count (too few sperm per ejaculate).arrow_forward
- select ALL that are TRUE about sperm:☑️Meiosis is suspended twice in sperm development; meiosis of sperm is completed when the sperm penetrates an egg ☑️Both the activity of sperm flagella, and the contraction of uterine muscles, are required to propel sperm to the egg in a timely fashion ☑️Each of the four sperm formed by one meiotic event is genetically unique and haploid ☑️ Sperm secrete testosterone which stimulates sustentacular cells to help their development\arrow_forwardDraw two graphs that illustrate the uterine and ovarian cycles. Explain the functions and FSH, LH, estrogen, and progesterone, giving a step-by-step explanation of maturation of a follicle, ovulation, and the corresponding stages of development of the endometrium.arrow_forwardIdentify the structure and function of key anatomical features of the female reproductive system including: external genitalia (labia majus and minus, vestibule, clitoris) internal genitalia and ducts (vagina, cervix, uterus, uterine tubes) ovaries2. Describe the process of oogenesisarrow_forward
- a) Give a detailed account of the hormonal control of the human menstrual cycle. Briefly explain the similarities and differences between oogenesis and spermatogenesis. b)arrow_forwardIdentify 3 effects of progesterone on pregnancy. Select one or more: O a. This causes the uterus to remain contracted after delivery to reduce blood loss from the placental site O b. This is produced when the ovarian follicle that encloses the developing egg forms a structure called the corpus luteum O c. This decreases bladder tone leading to an increased risk of urinary infection O d. This prepares the body for pregnancy. It acts as an appetite stimulant Identify 1 effect of the hormone vasopressin in pregnancy. Select one: O a. This has an important compensatory mechanism for restoring blood pressure in hypovolaemic shock such as that which occurs during haemorrhage O b. Promotes the maintenance of the corpus luteum at the beginning of pregnancy O C. Involved in thickening of the endometrium and other aspects of regulating the menstrual cyclearrow_forwardS 17. Summarize the development of the ovarian follicles as indicated below. Shape of follicular cells? Name of Follicle Oocyta (1º, 2º, or no oocyte present) (Flat or cuboidal) Zona pellucid a and zona radiata present 7 (Yes or no) Antrum Stage 7 of melos! s of the oocyte In the follicle (None, small, or large) N/A N/A How many go onto next stage of developme nt? If the ovulated oocyte is fertilized, the corpus luteum survives a few months; Otherwise, the corpus luteum becomes a corpus albicans. Oarrow_forward
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