ANS 331 - Exam 2 (Fall 2024)
Study online at https://quizlet.com/_hspikr
1. In livestock species, which phase of estrous lasts the longest?: diestrus
2. Which part of the pituitary has a specialized capillary system?: anterior pituitary /
Adenohypophysis
3. Where is oxytocin produced?: PVN
4. What is the function of the hypothalamo-hypophyseal portal system?: To allow
minute quantities of GnRH to act on the anterior pituitary
5. What structure is the neural control center for hormones?: hypothalamus
6. In the posterior pituitary, where are neurohormones deposited?: Directly into the
capillaries
7. Suppression of GnRH neurons = __________ feedback: negative
8. Hormones under nervous control that are released under a sudden burst or
pulse are:: episodic
9. Name a reproductive hormone involved in positive feedback?: estradiol
10. When progesterone concentrations are high, there is ___________ on GnRH.-
: negative feedback
11. Which type of hormone(s) bind to plasma membrane receptors?: protein and fast
steroid
12. Which type of hormone(s) bind to nucleus receptors?: slow steroid
13. The steroid hormone receptor response that mimics protein hormone recep-
tor response is:: fast
14. Which type of hormone signal requires a neurohormone to enter the blood-
stream and enter a remote target tissue?: Neuroendocrine reflex
15. Which type of receptors bind protein hormones?: plasma memebrane receptors
16. Which control center of the hypothalamus responds to negative feedback?-
: Tonic center
17. FSH and LH are examples of what?: Glycoproteins
18. Which type of hormone response involves mRNA and protein synthesis?: Slow
response
19. Progesterone secretion is an example of ________ secretion.: sustained
20. Which of the following is an example of a gonadotropin?
· Prostaglandin
· Oxytocin
, ANS 331 - Exam 2 (Fall 2024)
Study online at https://quizlet.com/_hspikr
· FSH
· GnRH: FSH
21. The number of receptors is _____ correlated with response.: Positively
22. This method of measuring hormone concentrations involves isotope detec-
tion: RIA
23. What is the pattern of LH secretion in males?: small, continuous pulses every 2-6 hours
24. The male Hypothalamus does not have a ___________.: surge center
25. In which sex is puberty better understood?: female
26. Attainment of puberty is more accurately described as:: occurring over a period of time
(a dimmer switch)
27. In the female, what are the two main factors effecting the onset of puberty?: ·
Exposure to environmental or social cues
· Threshold body size
28. The hypothalamus is inherently ___________.: female
29. Which is true about the male?
· LH does not surge
· The surge center is under the control of negative feedback
· Puberty attainment is like an on/off switch: LH does not surge
30. What factors affect age at puberty in the female?: Genetics
Body condition
Male presence
Group size and density
Season born
31. Which of the following is NOT considered the onset of puberty in females?
· First parturition
· First estrous
· First confirmed pregnancy
· First ovulation: First parturition
32. What two physical factors work together to cause ovulation?: 1. Collagenase
weakens basement membrane
2. Follicular fluid volume increases, causing pressure to increase
, ANS 331 - Exam 2 (Fall 2024)
Study online at https://quizlet.com/_hspikr
33. What is the dominant structure on the ovary when :
When P4 is high?: CL
34. What is the dominant structure on the ovary when :
During days 1-3 of the estrous cycle?: CH
35. What is the dominant structure on the ovary when :
When E2 is high?: Pre-ovulatory follicle
36. What is the dominant structure on the ovary when :
When PGF2a is high?: CL (about to be destroyed)
37. What is the dominant structure on the ovary when :
When E2 is low, negative feedback on anterior pituitary?: primary or secondary follicles
38. What is the dominant structure on the ovary when :
During Diestrus?: CL
39. What is the dominant structure on the ovary when :
During Estrus?: Pre-ovulatory follicle
40. Why can't neurons in the surge center secrete much GnRH prior to puberty
in the female?: Estradiol concentrations are too low
41. Which of the following is NOT considered a definition of age of puberty in the
male?
· First ejaculation
· First ejaculation with live spermatozoa
· When backfat reaches a certain depth (dependent on species)
· First ejaculation with adequate spermatozoa: When backfat reaches a certain depth (depen-
dent on species)
42. Prior to puberty in females, there is low estradiol due to:: little follicular growth
43. T or F: The presence of a mature male often hastens the onset of puberty in
livestock species.: true
Study online at https://quizlet.com/_hspikr
1. In livestock species, which phase of estrous lasts the longest?: diestrus
2. Which part of the pituitary has a specialized capillary system?: anterior pituitary /
Adenohypophysis
3. Where is oxytocin produced?: PVN
4. What is the function of the hypothalamo-hypophyseal portal system?: To allow
minute quantities of GnRH to act on the anterior pituitary
5. What structure is the neural control center for hormones?: hypothalamus
6. In the posterior pituitary, where are neurohormones deposited?: Directly into the
capillaries
7. Suppression of GnRH neurons = __________ feedback: negative
8. Hormones under nervous control that are released under a sudden burst or
pulse are:: episodic
9. Name a reproductive hormone involved in positive feedback?: estradiol
10. When progesterone concentrations are high, there is ___________ on GnRH.-
: negative feedback
11. Which type of hormone(s) bind to plasma membrane receptors?: protein and fast
steroid
12. Which type of hormone(s) bind to nucleus receptors?: slow steroid
13. The steroid hormone receptor response that mimics protein hormone recep-
tor response is:: fast
14. Which type of hormone signal requires a neurohormone to enter the blood-
stream and enter a remote target tissue?: Neuroendocrine reflex
15. Which type of receptors bind protein hormones?: plasma memebrane receptors
16. Which control center of the hypothalamus responds to negative feedback?-
: Tonic center
17. FSH and LH are examples of what?: Glycoproteins
18. Which type of hormone response involves mRNA and protein synthesis?: Slow
response
19. Progesterone secretion is an example of ________ secretion.: sustained
20. Which of the following is an example of a gonadotropin?
· Prostaglandin
· Oxytocin
, ANS 331 - Exam 2 (Fall 2024)
Study online at https://quizlet.com/_hspikr
· FSH
· GnRH: FSH
21. The number of receptors is _____ correlated with response.: Positively
22. This method of measuring hormone concentrations involves isotope detec-
tion: RIA
23. What is the pattern of LH secretion in males?: small, continuous pulses every 2-6 hours
24. The male Hypothalamus does not have a ___________.: surge center
25. In which sex is puberty better understood?: female
26. Attainment of puberty is more accurately described as:: occurring over a period of time
(a dimmer switch)
27. In the female, what are the two main factors effecting the onset of puberty?: ·
Exposure to environmental or social cues
· Threshold body size
28. The hypothalamus is inherently ___________.: female
29. Which is true about the male?
· LH does not surge
· The surge center is under the control of negative feedback
· Puberty attainment is like an on/off switch: LH does not surge
30. What factors affect age at puberty in the female?: Genetics
Body condition
Male presence
Group size and density
Season born
31. Which of the following is NOT considered the onset of puberty in females?
· First parturition
· First estrous
· First confirmed pregnancy
· First ovulation: First parturition
32. What two physical factors work together to cause ovulation?: 1. Collagenase
weakens basement membrane
2. Follicular fluid volume increases, causing pressure to increase
, ANS 331 - Exam 2 (Fall 2024)
Study online at https://quizlet.com/_hspikr
33. What is the dominant structure on the ovary when :
When P4 is high?: CL
34. What is the dominant structure on the ovary when :
During days 1-3 of the estrous cycle?: CH
35. What is the dominant structure on the ovary when :
When E2 is high?: Pre-ovulatory follicle
36. What is the dominant structure on the ovary when :
When PGF2a is high?: CL (about to be destroyed)
37. What is the dominant structure on the ovary when :
When E2 is low, negative feedback on anterior pituitary?: primary or secondary follicles
38. What is the dominant structure on the ovary when :
During Diestrus?: CL
39. What is the dominant structure on the ovary when :
During Estrus?: Pre-ovulatory follicle
40. Why can't neurons in the surge center secrete much GnRH prior to puberty
in the female?: Estradiol concentrations are too low
41. Which of the following is NOT considered a definition of age of puberty in the
male?
· First ejaculation
· First ejaculation with live spermatozoa
· When backfat reaches a certain depth (dependent on species)
· First ejaculation with adequate spermatozoa: When backfat reaches a certain depth (depen-
dent on species)
42. Prior to puberty in females, there is low estradiol due to:: little follicular growth
43. T or F: The presence of a mature male often hastens the onset of puberty in
livestock species.: true
