Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 50, Problem 10TYU
Give examples of negative feedback and positive feedback in hormonal control of the human menstrual cycle. Why can high estradiol levels be considered a “readiness” signal from a follicle?
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Chapter 50 Solutions
Biological Science
Ch. 50 - Prob. 1TYKCh. 50 - Prob. 2TYKCh. 50 - Prob. 3TYKCh. 50 - Prob. 6TYKCh. 50 - Prob. 4TYKCh. 50 - 8. Summarize the experimental evidence that...Ch. 50 - Prob. 5TYKCh. 50 - Prob. 7TYUCh. 50 - 8. Give examples of negative feedback and positive...Ch. 50 - Contrast spermatogenesis with oogenesis in humans....
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- Figure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardOutline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.arrow_forwardFigure 43.17 Which of the following statements about the menstrual cycle is false? Progesterone levels rise during the luteal phase of the ovarian cycle and the secretory phase of the uterine cycle. Menstruation occurs just after LH and FSH levels peak. Menstruation occurs after progesterone levels drop. Estrogen levels rise before ovulation, while progesterone levels rise after.arrow_forward
- List four events that are triggered by the surge of LH at the midpoint of the menstrual cycle.arrow_forwardMatch each hormone with its effect. oxytocin a. growth of facial hair testosterone b. uterus contracts LH c. LH, FSH are released GnRH d. surge causes ovulation FSH e. follicle develops HCG f. milk is produced prolactin g. corpus luteum is maintainedarrow_forwardFigure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forward
- Distinguish between: a. seminiferous tubule and vas deferens b. sperm and semen c. Leydig cells and Sertoli cells d. primary oocyte and secondary oocyte e. follicle and corpus luteum f. the three phases of the menstrual cyclearrow_forwardIf the release of LH were inhibited in a human female, which of the following events would not occur? O maturation of a primary follicle and oocyte O ovulation of a secondary oocyte O release of GNRH from the hypothalamus release of FSH from the pituitary O production of estrogen by follicle cellsarrow_forwardDuring the follocular phase of the ovarian cycle, what does an increase in estrogen concentrations correlate with? 1-The degradation of a follicle containing an egg(oocyte) 2-The formation of the corpus luteum 3-The maturation of a follicle containing an egg(oocyte) 4- The degradation of teh corpus luteumarrow_forward
- Describe the hormonal control of spermatogenesis in terms of the hypothalamic-pituitarygonadal axis (HPG axis) – in this case, the hypothalamic-pituitary-testes axisList the anabolic and androgenic effects of testosteronearrow_forwardHow do follicles influence FSH and LH levels at the end of the follicular phase, right before ovulation? Follicles release high quantities of estrogen, which result in a large increase in LH and a small increase in FSH O Follicles release high quantities of progesterone, which result in a large increase in LH and a small increase in FSH O Follicles release low quantities of estrogen, whch result in a large increase in LH O Follicles release low quantities of progesterone, which result in a large increase in LH and a small increase in FSHarrow_forwardExplain the Hormone level during monthly cycle .( marks 10)arrow_forward
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