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