Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 15RFT
A blastocyst is a(n)
(a) extra-embryonic membrane that forms blood vessels.
(b) solid ball of cells.
(c) hollow ball of cells.
(d) portion of the placenta.
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Chapter 28 Solutions
Human Anatomy (9th Edition)
Ch. 28 - Match each numbered item with the most closely...Ch. 28 - Prob. 2RFTCh. 28 - Prob. 3RFTCh. 28 - Prob. 4RFTCh. 28 - Prob. 5RFTCh. 28 - Prob. 6RFTCh. 28 - Prob. 7RFTCh. 28 - Prob. 8RFTCh. 28 - Match each numbered item with the most closely...Ch. 28 - Prob. 10RFT
Ch. 28 - Identify the two extra-embryonic membranes and the...Ch. 28 - Prob. 12RFTCh. 28 - Prob. 13RFTCh. 28 - Prob. 14RFTCh. 28 - 15. A blastocyst is a(n)
(a) extra-embryonic...Ch. 28 - During the second trimester, the most significant...Ch. 28 - Prob. 17RFTCh. 28 - Prob. 18RFTCh. 28 - The extra-embryonic membrane that forms the...Ch. 28 - During implantation, the (a) syncytiotrophoblast...Ch. 28 - 1. What would be the fate of an embryo if the...Ch. 28 - Prob. 2RCCh. 28 - 3. The stage of development that follows cleavage...Ch. 28 - Prob. 4RCCh. 28 - Prob. 5RCCh. 28 - Describe the effects of human chorionic...Ch. 28 - 7. What occurs during amphimixis?
Ch. 28 - Prob. 8RCCh. 28 - Prob. 9RCCh. 28 - Prob. 10RCCh. 28 - 1. Joe and Jane desperately want to have children,...Ch. 28 - 2. The virus that causes rubella, or "German...
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- The zygote arrives in the uterine cavity as a, (a) morula. (c) lacuna. (b) trophoblast. (d) blastomere.arrow_forwardThe myometrium is the muscular layer of the uterus, and the endometrium is the (a) serosa, (b) adventitia, (c) submucosa, (d) mucosa.arrow_forwardThe fetal period is (a) from weeks 9–38, (b) the time of rapid growth of body organs, (c) a time of cell differentiation, (d) all of the above, (e) none of the above.arrow_forward
- Which of the following statements about the uterine cervix is false? (a) It dilates at the end of the first stage of labor. (b) The internal os opens into the vagina. (c) The cervical glands secrete mucus. (d) It contains the cervical canal.arrow_forwardThe surface that enables active and passive exchange between the fetal and maternal bloodstreams is the (a) yolk stalk. (b) chorionic villi. (c) umbilical veins. (d) umbilical arteries.arrow_forwardThe gradual modification of anatomical structures during the period from conception to maturity is, (a) development. (b) differentiation. (c) embryogenesis. (d) capacitation.arrow_forward
- The birth starts thanks to increased ... a) ... stretching of the uterine muscles. b) ... release of oxytocin. c) ... release of glucocorticoids from the fetus. d) ... release of estrogen from the placenta.arrow_forwardIn the sentence "The placenta performs an important function for the fetus," what does the word function mean? (A) position (B) organ (C) result (D) purposearrow_forwardThe part of the endometrium that undergoes cyclical changes in response to variations in sex hormone levels is the, (a) serosa. (b) basal layer. (c) muscular myometrium. (d) functional layer.arrow_forward
- Match each date in column B (approximate time after conception) with a developmental event or stage in column A.Column A Column B(1) blastocyst (a) 38 weeks(2) implantation occurs (b) 15 days(3) first few somites appear (c) 4–7 days(4) flat embryo becomes cylindrical (d) about 21 days(5) embryo/fetus boundary (e) about 21–24 days(6) birth (f) 2nd of week 8(7) primitive streak appears (g) days 6–13arrow_forwardA friend in your dormitory, a freshman, tells you that she just discovered she is 3 months pregnant. You know that since she came to college she has been experimenting with recreational drugs. Circle the best advice you could give her, and explain your choice. (a) She must stop taking the drugs, but they could not have affected her fetus during these first few months of her pregnancy. (b) Harmful substances usually cannot pass from mother to embryo, so she can keep using drugs. (c) There could be defects in the fetus, so she should stop using drugs and visit a doctor as soon as possible. (d) If she has not taken any drugs in the last week, she is OK.arrow_forwardIf the uterine tube is a trumpet (“salpinx”), what part of it represents the wide, open end of the trumpet? (a) isthmus, (b) ampulla, (c) infundibulum, (d) flagellum.arrow_forward
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