The Oestrus Cycle

23 Questions | Total Attempts: 793

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The Oestrus Cycle - Quiz

The oestrus cycle, hormones of humans and animals - introductory vet


Questions and Answers
  • 1. 
    What is the oestrus cycle?
    • A. 

      A repetitive pattern of hormones and behaviour that leads to ovulation

    • B. 

      A repetitive pattern of hormones that leads to ovulation

    • C. 

      A repetitive pattern of behaviours that leads to ovulation

  • 2. 
    Which of these are behavioural periods of oestrus?
    • A. 

      Prooestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 3. 
    Which of these are ecndocrine periods of oestrus?
    • A. 

      Prooestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 4. 
    Which of these make up the follicular stage?
    • A. 

      Prooestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 5. 
    Which of these make up the luteal stage?
    • A. 

      Prooestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 6. 
    Proestrus is the formation of follicles, secretion of pheremones and the myometrium increases in size
    • A. 

      True

    • B. 

      False

  • 7. 
    The Follicular phase includes Proestrus and Oestrus and is Proliferative - the endometrium increases in size
    • A. 

      True

    • B. 

      False

  • 8. 
    The Luteal phase includes metoestrus and dioestrus and prepares for pregnancy and decides if it is pregnant. Lasts around 9-10 days in domestic speciese. It is the secretory phase as the endometrium begins to secrete progesterone
    • A. 

      True

    • B. 

      False

  • 9. 
    Which stage is when sexual receptitivty and ovulation occurs?
    • A. 

      Proestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 10. 
    Which stage is when formation of the corpus luteum and beginning of progesterone secretion occurs?
    • A. 

      Proestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 11. 
    Which stage is when  progesterone secretion continues?
    • A. 

      Proestrus

    • B. 

      Oestrus

    • C. 

      Metoestrus

    • D. 

      Dioestrus

  • 12. 
    What is polyoestrus
    • A. 

      Continuous cycle of follicular, luteal, folliular

    • B. 

      Continuous cycle of follicular, luteal, anoestrus, folliular

  • 13. 
    What animals are polyoestrus?
    • A. 

      Human

    • B. 

      Cow

    • C. 

      Sow

    • D. 

      Mare

    • E. 

      Ewe

    • F. 

      Dog

  • 14. 
    What animals are seasonal?
    • A. 

      Doe

    • B. 

      Cow

    • C. 

      Queen

    • D. 

      Mare

    • E. 

      Ewe

    • F. 

      Dog

  • 15. 
    What animals are monoestrus?
    • A. 

      Doe

    • B. 

      Cow

    • C. 

      Fox

    • D. 

      Mare

    • E. 

      Ewe

    • F. 

      Dog

  • 16. 
    Seasonal Oestrus is when repeated cycles are seen all year round
    • A. 

      True

    • B. 

      False

  • 17. 
    Absence of Oestrus is called Anoestrus
    • A. 

      True

    • B. 

      False

  • 18. 
    Seasonal breeding is regulated by day length due to melatonin production from the pituitary gland which INHIBITS oestrus
    • A. 

      True

    • B. 

      False

  • 19. 
    What animals are long day breeders?
    • A. 

      Horse

    • B. 

      Rabbit

    • C. 

      Ewe

    • D. 

      Human

  • 20. 
    What animals are short day breeders?
    • A. 

      Horse

    • B. 

      Rabbit

    • C. 

      Ewe

    • D. 

      Human

  • 21. 
    In the absence of pregnancy the Corpus Luteum must undergo Luteolysis before the next cycle can be initiaed - occurs through prostaglandin
    • A. 

      True

    • B. 

      False

  • 22. 
    What is Maternal Recognition?
    • A. 

      A signal required to block prostaglandin (which causes lysis of CL) if pregnant

    • B. 

      A signal required to secrete prostaglandin if pregnant

    • C. 

      The body recognises if it is pregnant

  • 23. 
    What hormone initiates Lactation?
    • A. 

      Prolactin

    • B. 

      FSH

    • C. 

      Prostglandin

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