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Concept explainers
To review:
Match the term second 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 second trimester is the period from week 12 to week 28, roughly from fourth to the sixth month of the gestation period. This phase is known as honeymoon period. Mothers have more energy comparatively during this period of 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 ... a) ... FSH (follicle stimulating hormone). b) ... progesterone. c) ... estrogen (estradiol). d) ... LH (luteinizing hormone). e) ... relaxin.arrow_forward
- Ovum production, or oogenesis, begins, (a) before birth. (b) after birth. (c) at puberty. (d) after pubertyarrow_forwardThe 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_forwardA mature follicle mainly secretes ... ... progesterone. ... LH (luteinizing hormone). ... estrogen (estradiol). ... relaxin. ... FSH (follicle stimulating hormone)arrow_forward
- In men, LH (luteinizing hormone) stimulates ... a) ... spermatogenesis. b) ... the development of the sperm ducts. c) ... the production of testosterone.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_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_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_forwardThe hormone-secreting layer of the placental barrier is (a) the extraembryonic mesoderm, (b) the lacunae, (c) endothelium, (d) cytotrophoblast, (e) syncytiotrophoblast.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
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