Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
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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Which row correctly identifies the function and source of hCG, respectively?
Select one:
a.
Function
Source
Stimulates FSH
Anterior pituitary
b.
Function
Source
Aids implantation
Uterus
c.
Function
Source
Maintains corpus luteum
Trophoblast and placenta
d.
Function
Source
Stimulates estrogen
Ovary
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Prob. 4DAACh. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Prob. 4SQCh. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...
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 - Place these events in human development in the...Ch. 42 - The rubella virus causes German measles. If a...Ch. 42 - A nursing mother who has an alcoholic drink...Ch. 42 - To determine the effect of the bicoid gene,...Ch. 42 - If an embryo splits at the two-cell stage, each of...
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- The presence of human chorionic gonadotropin (HCG) A. Indicates pregnancyB. Indicates implantationC. Is the basis of a (+) pregnancy testD. A, BE. A, B, Carrow_forward1. A placenta vera is formed if a.The placenta is removed during birth. b. The maternal blood bathes the chorionic villi. c. The epithelium of the decidua is not penetrated by the chorion. d. The binucleated chorionic cells penetrate the decidual epithelium. 2. Which of the following does NOT occur during decidualization? a. endometrial capillaries dilate and form sinusoids b. syncytiotrophoblast extend further and form chorionic villi c. endometrial stromal cells accumulate glycogen and lipids d. syncytiotrophoblast is eroded and lacunae are filled with maternal blood 3. Which of the following reasons justifies the midblastula transition? a. The yolk at the vegetal pole slows down the cleavage divisions. b. The embryo has already completed the requirements for initial cleavage. c. The embryo needs to replenish transcripts after using its maternal reserves. d. The embryo needs to replenish its energy after several rounds of fast…arrow_forwardAn appointment to a Obstetricians office was schedeuled by a client because a home pregnancy test was performed and the results were positive. The nurse determines that the home pregnancy test identified the presence of which of the ff in the urine? A. HUMAN CHORIONIC GONADOPRIN HCG B. PROGESTERONE C. ESTROGEN D. FOLLICLE STIMULATING HORMONEarrow_forward
- Which row correctly identifies the function and a source of hCG, respectively? Select one: A. Function Source Stimulate Estrogen Ovary B. Function Source Stimulate FSH Anterior Pituitary C. Function Source Aid Implantation Uterus D. Function Source Maintains Corpus Luteum Trophoblast and Placentaarrow_forwardChemicals that affect certain body organs a. testosterone b. hormones c. estradiol d. inhibinarrow_forwardthe barrier seperates the spermatocytes dividing by meiosis from exposing their unique antigens to the immune system. a. blood-brain barrier b. blood-testes barrier c. blood-vas deferens barrierarrow_forward
- 1. A placenta vera is formed if a.The placenta is removed during birth. b. The maternal blood bathes the chorionic villi. c. The epithelium of the decidua is not penetrated by the chorion. d. The binucleated chorionic cells penetrate the decidual epithelium. 2. Which of the following does NOT occur during decidualization? a. endometrial es dilate and form sinusoids b. syncytiotrophoblast extend further and form chorionic villi c. endometrial stromal cells accumulate glycogen and lipids d. syncytiotrophoblast is eroded and lacunae are filled with maternal blood 3. Which of the following reasons justifies the midblastula transition? a. The yolk at the vegetal pole slows down the cleavage divisions. b. The embryo has already completed the requirements for initial cleavage. c. The embryo needs to replenish transcripts after using its maternal reserves. d. The embryo needs to replenish its energy after several rounds of fast division.arrow_forwardExplain why each choice (a-d) is correct or incorrect The blood testis barrier is to newly formed sperm cells as the blood thymus barrier is to a.T lymphocyte precursors b. Mast cells c. Plasma cells d. White pulparrow_forwardSome expensive home pregnancy tests claim to detect hCG as early as 5 days after conception ( when hCG are barely there). With the knowledge of how pregnancy tests work, please describe how a pregnancy test manufacturer could create such ultra sensitive test?arrow_forward
- Progesterone is made during the third trimester by the: a. placenta b. endometrial lining c. chorion d. corpus luteumarrow_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_forwardWhat is the correct path of sperm during ejaculation?_________ A. Ejaculatory duct, epididymis, vas deferens, urethra B. Vas deferens, ejaculatory duct, epididymus, urethra C. Epididymis, ejaculatory duct, vas deferens urethra D. Epididymis, vas deferens, ejaculatory duct, urethraarrow_forward
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