ANS3319C Exam 3 Study Guide HO Fall2010

ANS3319C Exam 3 Study Guide HO Fall2010 - ANS3319C Exam 3...

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ANS3319C Exam 3 Review Note: This review was prepared by former ANS 3319C student (Erin Dickerson) and Dr. Yelich. However, it is not inclusive of everything that could appear on Exam 3. Therefore, do NOT just study this to prepare for the exam. Be sure to study lecture notes, Take home messages on semen collection/BSE in bull, semen evaluation & freezing, placental lab, and read the book to be fully prepared. Best of luck. Reproductive Cyclicity-Follicular Phase 1. Please circle the most appropriate choice Stage of estrous cycle Progesterone Estrogen LH FSH Proestrus Increasing Decreasing Increasing Decreasing Increasing Decreasing Increasing Decreasing Estrus Low High Increasing Decreasing Surge No change Low High Metestrus Increasing Decreasing Low High Low High Low High Diestrus Low High Low High Low High Low High 2. What role does progesterone (low, elevated/sustained, decreasing) have on LH secretion (pulse frequency and amplitude) and eventually follicle development during the different stages of the estrous cycle? 3. As progesterone concentrations decline, estrogen has a ____________ feedback effect on GnRH release from the hypothalamus to stimulate the surge of _______ from the pituitary. 4. During the estrous cycle, what is the origin of estrogen and what are the specific cells that secrete it? 5. Wave-like patterns of follicle development is referred to as ______________. 6. Please circle the most appropriate term. Make sure you understand why the hormone concentrations are at the levels they are for each respective stage of follicle development. Stage of follicle development FSH LH Inhibin Estrogen Recruitment Increasing Decreasing Low High Low High Low High Selection Low Medium High Increasing Decreasing Low Medium Increasing Decreasing Dominance Low High Low High Low High Increasing Decreasing 7. Relative to ovarian function LH stimulates ____ cells, while FSH stimulates ____ cells. 8. What are the general functions of estrogen on the reproductive tract: 9. Define the term “spontaneous ovulator” and list four different species that are induced ovulators? 10. Define the term “induced ovulator” and list four different species that are induced ovulators? 11. Define the term “modified induced ovulator” and provide a species that is a modified induced ovulator ?
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ANS3319C Exam 3 Study Guide HO Fall2010 - ANS3319C Exam 3...

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