All physiological mechanisms are directed towards reproductive success in female. Do you agree with this statement? Explain your answer with examples.
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Q: The sexual response of males is quite different than that of females. T or F?
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- Which factors are responsible for successful reproduction in male? Do you think the reproductive efficiency of male is declining with the passage of time? Support your point of view with examples.Recall what you learned in class about the experiments that examined the effect of early treatment with hormones on adult reproductive behavior. Match the following behavioral outcomes with each of the manipulations in the questions below. Each answer may be used more than once. An XY animal is castrated (gonadectomized) at birth and treated with testosterone the same day and the next day. What reproductive behavior, if any will this animal show when treated with testosterone as an adult? An XY animal is castrated (gonadectomized) at birth and treated with estradiol the same day and the next day. What reproductive behavior, if any will this animal show when treated with estradiol and progesterone as an adult? An XX animal is not surgically manipulated, but is treated with testosterone on the day of its birth and the day…The sexual response of males is quite different than that of females. T or F?
- Which of the following statements does NOT correctly describe a difference between the male and female reproductive systems? Select one: a. Testosterone has a major role in the development of secondary sexual characteristics in male reproductive systems, whereas LH promotes the development of secondary sexual characteristics in females. b. The male reproductive system mass produces large quantities of gametes each day, whereas the female reproductive system produces an average of a single gamete each month. c. The excretory and reproductive systems both use the urethra in males, whereas in females, there are separate tubes for the excretory and reproductive systems. d. The structures that produce gametes are exterior to the body in the male reproductive system, whereas the gametes are produced inside the body for females.What is the expected effect on reproduction on an individual with hormone levels shown above? Identify two physiological changes that will not occur due to the atypical hormone levels shown above. The graph below shows the estrogen and progesterone levels of an individual during a menstrual cycle of 28 days. The top light blue line indicates the progesterone levels and the bottom purple line indicates the estrogen levels. This individual is in luteal phase.This individual can be expected to have low levels of FSH and LH.The sex response is an inborn reflex. What stimuli trigger the reflex? What two physiological mechanisms (other than the brain) are responsible for the physical changes that appear during the sexual response? [Hint: One begins with “va” and the other with “my.”] Give examples of the effects of both these two physiological mechanisms.
- Figure 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.Infertility is defined as the inability to get pregnant despite having frequent, unprotected sex for at least a year. In trying to discover the cause of a female patient’s infertility, her doctor ordered an analysis of circulating hormone levels every day during her 28-day reproductive cycle. Her progesterone levels started very close to zero ng/mL on the first day and remained there throughout her entire 28-day cycle. Based on these results, and your understanding of progesterone, explain why this female is unlikely to achieve a successful pregnancyWhich of the following events does NOT occur initially during a female reproductive cycle? * Progesterone promotes the secretory phase. FSH & LH stimulates development ovarian follicles& secretion of Estrogen. Estrogen promotes proliferative & secretory phases. FSH & LH stimulates development ovarian follicles & secretion of Progesterone. Hypothalamus release GNRH, which stimulates the Pituitary Gland to secrete FSH & LH.
- Although the most effective form of an oral contraceptive for woman contain estrogen and progestin, some birth control pills contain a small dose of progestin-only. This is because there are many risks and side effects. Which of the following statements is NOT a reason for using a progestin-only oral contraceptive? Select one: A. progesterone maintains the corpus luteum as corpus luteum release a large amount of progesterone and estrogen. B. progesterone suppresses the maturation of follicles, thereby preventing ovulation of a mature ovum. C. progestin-only oral contraceptives prevent the production of FSH and LH in the anterior pituitary. D. progesterone suppresses the production of GnRH in the hypothalamus.Listed in the table below are the five major reproductive hormones that support ovulation in female mammals, including the giant panda. Describe the role of each hormone in this process and the approximate time during the ovarian cycle that it reaches peak levels. Hormone Gonadotropin-releasing hormone (GnRH) Estrogen Luteinizing hormone (LH) Follicle stimulating hormone (FSH) Progesterone Role in Regulation of the Menstrual Cycle Timing of Peak LevelWhat does the graph show about estrogen and progesterone before and after ovulation? Please choose from one choice below. Before ovulation: Progesterone level is higher than estrogen; After ovulation: Estrogen level is higher than progesterone Before ovulation: Estrogen level is lower than progesterone; After ovulation: Progesterone level is higher than estrogen Before ovulation: Estrogen level is higher than progesterone; After ovulation: Progesterone level is higher than estrogen Before ovulation: Progesterone level is higher than estrogen; After ovulation: Estrogen level is lower than progesterone