BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 31, Problem 9SA
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Triiodothyronine and thyroxine are iodine-containing
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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
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- What is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionarrow_forwardEstradiol is found in high levels in the pregnant rat. This estradiol is prevented from affecting the development of the fetus because: a. it is chemically converted to testosterone, which does not affect the fetus b. it is bound by alpha-fetoprotein c. the blood-brain barrier keeps estrogens like estradiol out of the brain d. the fetus does not possess the estrogen receptors needed to respond to the estradiolarrow_forwardDuring adolescence, the events that interact to promote increased hormone production and sexual maturation result from activity of the (a) hypothalamus. (b) anterior lobe of the pituitary gland. (c) ovaries and testicular cells. (d) a, b, and c are correct.arrow_forward
- Hormones can be released into the blood ... a) ... in large quantities in response to stimuli. b) ... quite continuously. c) ... in cyclically increasing and decreasing quantities.arrow_forwardA tropic hormone is one whose function is to Answers: A.stimulate growth and development. B. stimulate endocrine tissue to secrete hormones. c. stimulate the central nervous system. D. trigger cellular development.arrow_forwardWhich of the following would most likely reduce levels of active estrogen to potentially modulate cancer risk? a) Increased alcohol consumption b) Increased dietary folate c) Decreased levels of sex-hormone-binding globulin d) Increased phytoestrogen intakesarrow_forward
- Sodium and potassium play a key role in the generation of____? A. hormones B. New tissue C. Nerve impulses D. Ionsarrow_forwardThe presence of a wattle and comb in a rooster is a result of: A. Ongoing presence of hormones in the rooster B. Previous presence of hormones during pubertal development C. Both previous and ongoing presence of hormones.arrow_forwardA 38-year-old male is upset about his low sperm count and visits a "practitioner" who commonly advertises his miracle cures of sterility. The practitioner is a quack who treats conditions of low sperm count with megadoses of testosterone. Although his patients experience a huge surge in libido, their sperm count is even lower after hormone treatment. a) Which two glands would be responsive to the megadose of testosterone? b) Identify the two hormones that would be affected by the megadose of testosterone. Would their levels increase or decrease? c) What role, if any, would either of the affected hormones have on the man's reduced sperm count?arrow_forward
- Use the graphs to answer the question. Which answer describes a logical reason why LH and FSH were chosen for this study? A. These hormones regulate gametogenesis and sex hormone production, so they play a pivotal role in puberty. B. These hormones are only present in individuals undergoing puberty, so they provide a good indication of puberty. C. These hormones directly cause puberty related changes. D. These hormones are the only ones that fluctuate with puberty while other hormones are unchanged. Use the graph to answer the question. The graph indicates increases in both FSH and LH for males and females. However, male and female signs of puberty differ. Which of the following explains why? A. Hormone levels increase for both of them, but LH levels increase more for males and less for females. B. FSH and LH trigger higher testosterone production in males and higher estrogen production in females. C. FSH and LH promote a positive feedback…arrow_forwardWhich of the following gland secretes insulin?A. Pituitary B. Thyroid C. Pancreas D. Ovariesarrow_forwardThe pineal gland produces melatonin, which helps regulate sleep by binding receptors in several tissues throughout the body. How would you characterize the pineal gland? A. The pineal gland is a sebaceous gland.. B. The pineal gland is an endocrine gland. C. The pineal gland is an exocrine gland. D. The pineal gland is a pancreatic gland.arrow_forward
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