WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 25, Problem 5MC
Summary Introduction
Introduction:
Prairie vole is a species of small rodents known for being monogamous.
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Scientists have noticed a disturbing trend in the freshwater ecosystems in North America: a large number of male fish are found to contain female egg cells growing inside their testes. The feminization of male fish is called intersex, and its exact cause is still baffling many scientists. Many studies have shown that intersex can be induced when male fish are exposed to endocrine disruptors. An endocrine disruptor stimulates or inhibits the endocrine system, causing either an increase or decrease in hormone production. However, it is easier to demonstrate the direct cause and effect in a laboratory environment where the fish are only exposed to a single endocrine disruptor. In nature, there are many other variables such as low oxygen levels or warmer water temperatures that could also cause feminization in fish.
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WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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- 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…arrow_forwardThe brain-pituitary relation in a typical teleost fish is characterized by this: a. A portal vessel collect blood from capillaries in the median eminence and carry it to the adenohypophysis (neuro-vascular pituitary control) b. Many neurohypophysal/hypothalamic axonal extensions penetrate the adenohypophysis and either directly innervate This problem has been solved! 1) The brain-pituitary relation in a typical teleost fish is characterized by this: a. A portal vessel collect blood from capillaries in the median eminence and carry it to the adenohypophysis (neuro-vascular pituitary control) b. Many neurohypophysal/hypothalamic axonal extensions penetrate the adenohypophysis and either directly innervate the adenohypophysal cells or ends near these cells allowing the local diffusion of neurosecretions (neuroglandular pituitary control) c. A thin neurohypophysis/hypothalamus that lies adjacent to a thin layer of glandular epithelial cells, permitting direct diffusion…arrow_forwardHormones are often used to control the development and metabolism of agriculturally important organisms. These hormones often end up in the external environment (water or soil). Based on your knowledge of hormonal action which of the following is a likely developmental effect of hormones in the environment on organisms in that environment? Group of answer choices A. Failure to form body axes B. Shortening of limbs C. Changes in the time to reach sexual maturity D. Changes one species into another E. Elongation of limbsarrow_forward
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