Chapter38Sum07

Chapter38Sum07 - Sexual and asexual reproduction are both...

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Asexual reproduction Budding Fission Fragmentation, accompanied by regeneration Development of an unfertilized egg Sexual and asexual reproduction are both common among animals Figure 27.1A
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Hydra
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Sexual reproduction The fusion of two haploid gametes from two parents to form a diploid zygote
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Fig. 38-16a, p.658 vas deferens epididymis testis penis seminal vesicle prostate gland bulbourethral gland urethra seminiferous tubule
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Hypothalamus Pituitary gland (secretes GnRH) (secretes LH and FSH)
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Fig. 38-16c, p.658 Sertoli cell spermato- gonium (diploid) primary spermatocyte MITOSIS MEIOSIS I MEIOSIS II A part of the lumen of one seminiferous tubule: immature sperm (haploid) late spermatid secondary spermatocyte early spermatids lumen
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Fig. 38-16b, p.658 wall of seminiferous tubule Leydig cells between tubules
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The shape of a human sperm cell is adapted to its function Benjamin Cummings Plasma membrane Tail Mitochondrion (spiral shape) Nucleus Acrosome
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Fig. 38-16a, p.658 vas deferens epididymis testis penis seminal vesicle prostate gland bulbourethral gland urethra seminiferous tubule Vasectomy blocks off the vas deferens:
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Ovaries Oviduct (Fallopian tube) Follicles Corpus luteum Uterus Wall of uterus Endometrium (lining of uterus) Vagina Cervix (“neck” of uterus) Benjamin Cummings
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Fig. 38-20, p.662 Ovulation. 1 o oocyte A corpus luteum forms from remnants of the ruptured follicle. zona pellucida starts forming around the primary oocyte. first polar body secondary oocyte Mature follicle. Meiosis I is over. The secondary oocyte and first polar body are now formed. ovary The corpus luteum breaks down when the woman doesn’t get pregnant.
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Ovulation
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A common problem in women is the development of an ovarian cyst. The cyst forms when a follicle fills with fluid instead of rupturing. The cyst will often go away on its own after several weeks but sometimes surgery is required. Some cysts can be as large as a canteloupe.
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Hypothalamus Pituitary gland (secretes GnRH) (secretes LH and FSH)
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Fig. 38-22, p.664 hypothalamus anterior pituitary Blood levels of: LH and FSH FSH LH LH estrogens progesterone, estrogen growth of follicle FOLLICULAR PHASE LUTEAL PHASE ovulation corpus luteum GnRH estrogens progesterone, estrogen Blood levels of estrogens and progesterone Inner lining of uterus: endometrium
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Fig. 38-21, p.663 HYPOTHALAMUS PITUITARY Blood level of
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Chapter38Sum07 - Sexual and asexual reproduction are both...

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