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Concept explainers
To review:
Match the term third trimester with the most closely related description given below:
Begins with the onset of the true labor
Begins as the dilation of the cervix is complete
Birth
Described by quick fetal growth
Incision via the peroneal musculature
A sheet of follicular cells around the oocyte
An enzyme in the acrosome
The cytoplasm of the oocyte
Time of embryonic/early fetal development
Described by the continued development of the organ systems
Introduction:
The gestation period is segregated into three trimesters namely first, second, and third. The first trimester starts from week 1 to the week 12. Second is marked from week 13 to week 26, and the third trimester is from week 27 to the end of the pregnancy.
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Chapter 28 Solutions
Pearson eText Human Anatomy -- Instant Access (Pearson+)
- During human gestation, rudiments of all organs develop (A) in the first trimester. (B) in the second trimester. (C) in the third trimester. (D) during the blastocyst stage.arrow_forwardThe hormones that stimulate the ovarian cycle are secreted by the _____________; the hormones that stimulate the uterine cycle are secreted by the _____________ (a) ovary / uterus, (b) pituitary gland / ovary, (c) follicle cells / functional layer, (d) interstitial cells / placenta, (e) ovary / pituitary gland.arrow_forwardA mature follicle mainly secretes ... ... progesterone. ... LH (luteinizing hormone). ... estrogen (estradiol). ... relaxin. ... FSH (follicle stimulating hormone)arrow_forward
- Ovum production, or oogenesis, begins, (a) before birth. (b) after birth. (c) at puberty. (d) after pubertyarrow_forwardA mature follicle mainly secretes ... a) ... FSH (follicle stimulating hormone). b) ... progesterone. c) ... estrogen (estradiol). d) ... LH (luteinizing hormone). e) ... relaxin.arrow_forwardIn females, meiosis is not completed (a) until birth. (b) until puberty. (c) until fertilization occurs. (d) until ovulation occurs.arrow_forward
- In men, LH (luteinizing hormone) stimulates ... a) ... spermatogenesis. b) ... the development of the sperm ducts. c) ... the production of testosterone.arrow_forwardA sudden surge in the level of LH causes, (a) the onset of menstruation. (b) the rupture of the follicular wall and ovulation. (c) the beginning of the proliferative phase. (d) the end of the uterine cycle.arrow_forwardWhich of the following events does not take place when a fetus is 17 to 20 weeks old? (a) fetal movements quicken, (b) testes descend to the scrotum, (c) silklike hair covers the skin, (d) sweat glands form.arrow_forward
- (c) Name two hormones produced by the ovaries in female. (d) Name the major cells in the gonads that produce the two hormones in (c) during follicular phase. during luteal phases. (e) Contraceptive pill contains the two hormones in (c). Briefly explain how they work.arrow_forwardPeaks of LH and FSH production occur during (A) the menstrual flow phase of the uterine cycle. (B) the beginning of the follicular phase of the ovarian cycle. (C) the period just before ovulation. (D) the secretory phase of the uterine cycle.arrow_forwardThe hormone-secreting layer of the placental barrier is (a) the extraembryonic mesoderm, (b) the lacunae, (c) endothelium, (d) cytotrophoblast, (e) syncytiotrophoblast.arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
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