Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 50, Problem 4TYK
Summary Introduction
Introduction:
The internal anatomy of the female reproductive system differs in different mammals and depends upon two vital functions of female reproductive system: egg production and transport, giving birth to offspring.
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Even though they are not a hormone, prostaglandins act in a similar way. Shortly answer the following question according to the diagram.
1.Do the prostaglandins serve as a hormonal control system? If so, identify that system and explain your answer.
Endocrinologists, scientists and medical doctors who study how hormones work in the body, can track reproductive hormones
in female mammals to determine when and how much of each of the hormones listed in the table above are present in the body
Tracking the leveis of hormones and when they are released provides valuable information for developing tests that can predict
when events, like ovulation, will occur
5.
Given the information in the table above, identify at least threo hormones that, if tracked, would be good indicators that
ovulation is about to occur ina female giant panda.
WCinizing hoYYmone (LH it IS the production tyiggering vel
M the follicie.- Follice Shmulahng hormone (FSH) Promotes the graw
Dlicies in the Ovary that produce cstrogçn 8 EStYogen: Prepaves the ui
cal implantation of 'an cmbhyo after fertilizatian takes place.
In order to best support panda reproduction by natural mating and artficial insemination, highly sensitive and specific tests are
wdaoeded to…
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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- As males and females age they produce lower volumes of sex hormones. For women, taking testosterone to increase libido in becoming more common. Why is the same not common for males?arrow_forwardResearchers measured prolactin and growth hormone in the blood plasma of six subjects at regular intervals over a 24-hour period. The investigators were interested in determining if the levels of these two hormones cycle over a 24-hour period. The Figure presents the results of their experiments, with the y axis values showing the amount of each hormone expressed as a percentage of the 24-hour mean value, and each point showing the average of the six subjects levels. FIGURE Mean concentrations of prolactin and growth hormone in plasma, averaged for six subjects and expressed as a percentage of the average concentrations measured for the 24-hour period. Do the results support the hypothesis that the changes in prolactin level over a 24-hour period are associated with the sleepwake cycle? Source: From J. F. Sassin et al. 1972. Human prolactin: 24-hour pattern with increased release during sleep. Science 177:12051207.arrow_forwardYou are studying the arthropod molting hormones. Your experimental organism is the silkworm. You are conducting a series of experiments. In the first experiment you decide to experimentally decrease the production of the ecdysone by inhibiting the activity of the prothoracic gland during the first instar stage while maintaining the production of the juvenile hormone at normal levels. In the second experiment, you decide to maintain the ecdysone level normal and spray the first instar with juvenile hormone. Predict the results of your two experiments.arrow_forward
- Which of the following is true regarding LH signaling in men? O Stimulates leydig cells to produce testosterone O Stimulates the sertoli cells to increase spermatogenesis O Stimulates the leydig cells to produce inhibin OStimulates the granulosa cells to increase spermatogenesis Stimulates the theca cells to produce testosteronearrow_forwardWhich hormone has both inhibiting and releasing action? Prolactin Somatostatin Somatotropin Gonadotropinarrow_forwardIn humans, which of the following are “gonadal hormones”? (click all that apply) - LH -GnRh - estradiols - FSH - Testosteronearrow_forward
- Levels of the Female Reproductive Hormones during the Menstrual Cycle Hormone Day 4 Day 14 Day 21 Estrogen (pg/mL) N/A >100 <60 Progesterone (ng/mL) N/A <1.5 >15 LH (mIU/mL) <7 >15 N/A FSH (mIU/mL) <13 >15 N/A Identify the hormones numbered in the graph above. Number: Answer Answer Answer Answer Hormone: Estrogen Progesterone LH FSHarrow_forwardOne of the main endocrine glands in the human body is the pituitary gland. This gland produces a variety of hormones with different effects. Among these are a heterogeneous group of hormones called tropic hormones, which directly stimulate the secretion of other hormones from downstream endocrine glands. Which of the following are tropic hormones? Select all that apply. LH Prolactin Oxytocin ACTH TSH testosteronearrow_forwardWhich of the following would be better handled with an endocrine system response (not a nervous system response) and why: A. Assessing a noise in your environment (such as the hum of an air conditioner), and adapting to it (so you no longer unnecessarily pay attention to something unimportant). B. Stimulating the gradual development (it takes days!) of follicles in the ovary, because hormonal signals have a more extended duration than a nervous system signal. C. Both choice A and choice B D. Neither A nor B.arrow_forward
- Which of the following changes are most likely to occur in a male songbird that has a mutation in the cells in its anterior pituitary gland such that FSH and LH are produced at 1% of normal levels? increased courtship displays to attract females decreased GnRH production increased testosterone production decreased frequency of "singing" to attract females Submit Request Answerarrow_forwardWhich of the following hormones controls the release of pituitary sex hormones? LH - luteinizing hormone FSH - follicle stimulating hormone GNRH - gonadotropin releasing hormone Testosteronearrow_forwardAccording to this diagram, why does the release of estradiol/inhibin stimulate a negative feedback loop on the anterior ptuitary gland? Isn't the anterior ptuitary gland negatively effected only when estradiol is low, and not high?arrow_forward
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