Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 42, Problem 14SQ
Summary Introduction
Concept introduction: Pregnancy tests are designed to test if the human female is pregnant or not. The test is based on the hormone, human chorionic gonadotropin (which is released only at the time of pregnancy).
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What would happen if the trophoblast did not secrete hCG upon implantation of the blastocyst? a. The cells would not continue to divide. b. The corpus luteum would continue to produce progesterone and estrogen. c. Menses would flush the blastocyst out of the uterus. d. The uterine mucosa would not envelop the blastocyst.
During oogenesis the cell that is fertilized by a sperm to become an egg is:
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primary spermatocyte
B
secondary oocyte
C
primary oocyte
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secondary spermatocyte
Damage to the sustentacular cells of the testes could impair:a. FSH and LH production. c. oogenesis.b. production of estrogens. d. spermatogenesis.
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Match each term with the most suitable...Ch. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Birth Defects and Multiple Births A woman who...
Ch. 42 - The placenta consists of __________. a. embryonic...Ch. 42 - During the fetal period, ____________. a....Ch. 42 - Prob. 9SQCh. 42 - Match each hormone with its action(s). ______...Ch. 42 - Prob. 11SQCh. 42 - Prob. 12SQCh. 42 - Prob. 13SQCh. 42 - Prob. 14SQCh. 42 - Prob. 15SQCh. 42 - The rubella virus causes German measles. If a...Ch. 42 - Prob. 2CTCh. 42 - Prob. 3CT
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- The advantage of chorionic villi sampling over amniocentesis is that Chorionic villi sampling: a. detects chromosomal abnormalities not detected by amniocentesis. b. can give results much earlier in the pregnancy than amniocentesis. c. is less likely to cause more miscarriages than amniocentesis. d. can detect chemical abnormalities not detected by amniocentesis. ...explain.arrow_forwardWhat condition is characterized by high blood pressure and proteinuria in a pregnant woman? A) Gestational diabetes B) Preeclampsia C) Eclampsia D) Chronic hypertensionarrow_forwardPlease answer both parts of the question.A 25-year-old woman comes to the pharmacy where you work and asks for apregnancy testing kit.a) Describe the cyclic hormonal changes AND the cyclic changes observed in the endometrium that occur during the menstrual cycle in non-pregnant women.b) Which hormone serves as the basis of standard pregnancy tests? From where is it secreted and what is its function?arrow_forward
- A 20-year-old woman with a history of irregular cycles complains of recent amenorrhea. Blood tests indicate normal glucose, but elevated gonadotropin levels, while blood and urine are negative for hCG. What is the most likely cause of the amenorrhea? Question 35 options: a) Uterine malformation b) Menopause c) Premature ovarian failure d) Polycystic ovarian syndromearrow_forwardIn human beings, after fertilisation, the structure which gets embedded in the wall of uterus is: (a) ovum (b) embryo (c) foetus (d) zygotearrow_forwardIn the fertility awareness method of birth control, a woman gauges her monthly fertile period by monitoring changes in the consistency of her vaginal mucus. What kind of information does such a method provide about the likelihood of getting pregnant?arrow_forward
- A human blastocyst normally implants in ................. a. an oviduct c. the uterus b. a seminiferous tubule d. the vaginaarrow_forwardEarly pregnancy tests used antibodies to detect the presence of human chorionic gonadotropin (hCG) in maternal urine. Explain how hCG, produced by the chorion, gets in maternal urine.arrow_forwardOestrogens are produced from androgens in the granulosa cells (GC) in the ovary. These androgens are derived from… a) The blood b) The interstitial (theca) cells c) Granulosa cells d) The oocytearrow_forward
- The trophoblasts of blastocyst will become the ____________. Question 12 options: a) chorionic sac & maternal portion of the placenta b) amniotic cavity c) inner cell mass d) chorionic sac & fetal portion of the placentaarrow_forwardWhich of the following situation leads to decreased fertility? Select one: A. Hepatitis B Infection B. Regular monthly menstrual cycles C. Exercising regularly and eating healthy D.Normal sperm countarrow_forwardWhat could be the reason why a woman only gets her period after puberty begins? A) Before puberty, high quantities of of corpus luteum are present B) Before puberty, GnRH levels may be too low. C) Before puberty, their endometrial lining is too thick.arrow_forward
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