More chat gpt qs based on sheep doc - asked chat gpt to make them tricky | Quizlet

1. The main reason follicular dominance is considered weak in sheep is:

A. Absence of LH receptors on granulosa cells

B. High progesterone throughout the cycle

C. More than one follicle reaches ovulatory size in a wave

D. FSH secretion is continuous

C. More than one follicle reaches ovulatory size in a wave

2. In sheep, the largest follicle of a wave:

A. Always suppresses the next wave

B. Prevents FSH secretion

C. Does not inhibit emergence of the next wave

D. Undergoes ovulation in every cycle

C. Does not inhibit emergence of the next wave

3. In prolific ewes, the increased ovulation rate is mainly due to:

A. Higher LH secretion

B. Higher FSH secretion

C. Rescue of follicles from penultimate wave

D. Larger follicle diameter

C. Rescue of follicles from penultimate wave

4. The first detectable rise in oestradiol during the ovine cycle occurs:

A. During early luteal phase

B. During mid-luteal phase

C. After onset of luteolysis

D. At ovulation

C. After onset of luteolysis

5. The hormone most responsible for initiating follicular wave emergence is:

A. LH

B. Estrogen

C. Progesterone

D. FSH

D. FSH

6. In sheep, the ovulatory follicles from the penultimate wave:

A. Never ovulate

B. Ovulate only in non-prolific breeds

C. May ovulate concurrently with final wave

D. Undergo atresia in all cases

C. May ovulate concurrently with final wave

7. Luteal regression in sheep is primarily mediated by:

A. Decrease in LH

B. Increase in estrogen

C. Pulsatile PGF₂α

D. Withdrawal of FSH

C. Pulsatile PGF₂α

8. The counter-current mechanism in sheep allows:

A. Direct uterine blood supply to ovary

B. Transfer of PGF₂α from uterus to ovary

C. Transport of LH from pituitary to ovary

D. Recycling of progesterone

B. Transfer of PGF₂α from uterus to ovary

9. The maximal functional diameter of the corpus luteum in sheep is:

A. 4-6 mm

B. 6-8 mm

C. 11-14 mm

D. 18-20 mm

C. 11-14 mm

10. The preovulatory LH surge in sheep occurs:

A. At ovulation

B. 2 hours before ovulation

C. ~14 hours before ovulation

D. 24 hours after ovulation

C. ~14 hours before ovulation

11. Which statement about FSH secretion in sheep is TRUE?

A. FSH peaks only once per cycle

B. FSH peaks are abolished during luteal phase

C. FSH peaks precede follicular wave emergence

D. FSH secretion is inhibited by estrogen

C. FSH peaks precede follicular wave emergence

12. During seasonal anoestrus in sheep:

A. LH secretion increases

B. FSH peaks disappear

C. Ovarian sensitivity to gonadotropins decreases

D. CL lifespan increases

C. Ovarian sensitivity to gonadotropins decreases

13. The main effect of progesterone on LH secretion in sheep is:

A. Positive feedback

B. No effect

C. Suppression of pulse frequency

D. Induction of LH surge

C. Suppression of pulse frequency

14. In prolific sheep, corpora lutea are typically:

A. Larger and fewer

B. Smaller and more numerous

C. Larger and more numerous

D. Smaller and fewer

B. Smaller and more numerous

15. The secondary FSH surge in sheep:

A. Occurs before ovulation

B. Coincides with LH surge

C. Occurs 20-36 hours after ovulation

D. Occurs only during anoestrus

C. Occurs 20-36 hours after ovulation

16. The long duration of follicular growth in sheep (primordial → ovulatory) is approximately:

A. 30 days

B. 2 months

C. 6 months

D. 12 months

C. 6 months

17. The primary luteotrophic hormone in sheep is:

A. FSH

B. Estrogen

C. LH

D. Prolactin

C. LH

18. The decline in progesterone at luteolysis results in:

A. Suppression of FSH

B. Increased LH pulse frequency

C. Decreased estrogen secretion

D. Inhibition of ovulation

B. Increased LH pulse frequency

19. In sheep, short cycles at the beginning of the breeding season are associated with:

A. Prolonged CL lifespan

B. Insufficient luteinisation

C. Excessive progesterone

D. Increased follicular dominance

B. Insufficient luteinisation

20. Compared to cattle, sheep differ mainly in:

A. Number of follicular waves

B. Presence of CL

C. Absence of FSH

D. Higher progesterone concentrations

A. Number of follicular waves