Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 39.3, Problem 1CC
Summary Introduction
To analyze:
The surge in blood concentration of FSH and LH in human males.
Introduction:
When a human male attains puberty or sexual maturity, his hypothalamus begins producing gonadotropin-releasing hormone (GnRH) in high amount. GnRH in turn stimulates pituitary gland to produce follicle stimulating hormone (FSH) and luteinizing hormone (LH). FSH and LH play important role in development of male gonads.
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Contrast the effects of FSH and LH.
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Chapter 39 Solutions
Principles of Biology
Ch. 39.1 - Choose the correct statement. The majority of...Ch. 39.2 - In _________ gametes are released in large numbers...Ch. 39.2 - In which way is gametogenesis similar in males and...Ch. 39.3 - Prob. 1CCCh. 39.3 - Prob. 1TYKCh. 39.3 - Prob. 2TYKCh. 39.4 - Prob. 1BCCh. 39.4 - Prob. 2BCCh. 39.4 - Prob. 1CCCh. 39.4 - Prob. 1TYK
Ch. 39.4 - Prob. 2TYKCh. 39.5 - The three germ layers of triploblasts are...Ch. 39.5 - Choose the correct sequence of events. cleavage...Ch. 39.6 - Under what condition(s) might you expect temporary...Ch. 39.6 - Prob. 2TYKCh. 39 - Prob. 1TYCh. 39 - Prob. 2TYCh. 39 - Spermatogonia are haploid germ cells. d. have...Ch. 39 - Prob. 4TYCh. 39 - Prob. 5TYCh. 39 - Prob. 6TYCh. 39 - A major function of FSH is to stimulate the...Ch. 39 - Prob. 8TYCh. 39 - Prob. 9TYCh. 39 - Cells of the neural crest give rise to the central...Ch. 39 - Prob. 1CCQCh. 39 - Prob. 2CCQCh. 39 - Prob. 3CCQCh. 39 - Describe the major events in animal development...Ch. 39 - Describe the events of the ovarian and uterine...
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- List four events that are triggered by the surge of LH at the midpoint of the menstrual cycle.arrow_forwardwhich hormone is capable of negative and psitive feedback effects on the pituitary gland during the normal menstrual cycle ?arrow_forwardCompare the changes in reproductive hormones andstructures that occur in older males and females.arrow_forward
- What is the result of The interactions among the ovaries, hypothalamus, andanterior pituitary gland produces the cyclical changes in the ovaries?arrow_forwardHow will the feedback mechanism in the menstrual cycle responds if there is ahigh level of Progesterone?arrow_forwardWhat is the relationshipbetween the estrogen leveland the LH level in themenstrual cycle? What is thefunction of LH in themenstrual cycle and whendoes its blood concentrationreach a peak?arrow_forward
- When would the LH surge begin? When would Anita have her highest levels of progesterone? When would Anita's progesterone start declining? What is the major cause of the LH surge?arrow_forwardWhat would happen to the LH/FSH blood levels after menopause (the cessation of the ovarian and uterine cycles)?arrow_forwardWhat conclusion can you draw regarding the relationship between the thickness of the endometrium and the hormone level of progesterone? Why does it make sense that the endometrium would be its thickest following ovulation?arrow_forward
- If a woman 7.5 months pregnant is found to have a marked decrease in plasma estrogen but normal plasma progesterone for that time of pregnancy, what would you conclude?arrow_forwardWhy do GnRH levels increase at the beginning of puberty?arrow_forwardIf you were a scientist trying to develop a male contraceptive acting on theanterior pituitary gland, would you try to block the secretion of FSH or LH?Explain?arrow_forward
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