Question 1
Question
What does GnRH stand for?
Question 2
Question
What is the purpose of GnRH?
Answer
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The hypothalamus stimulates cells in the anterior pituitary gland to produce LH and FSH.
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To encourage the body to be sexually active.
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To encourage the body to ovulate.
Question 3
Question 4
Question 5
Question
What is the purpose of LH?
Question 6
Question
What is the purpose of FSH.
Question 7
Question
Tick all that applies to dihydrotestosterone.
Answer
-
Prenatal development.
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Development of male sexual characteristics.
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Development of sexual function.
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Stimulation of anabolism.
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Development of female sexual characteristics.
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Growth of testis.
Question 8
Question
What hormone promotes development and maintenance of female reproductive structures, feminine secondary sex characteristics and breasts.
Answer
-
Estrogen.
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Progesterone.
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Relaxin.
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Inhibin.
Question 9
Question
What hormones inhibits release of FSH and, to a lesser extent, LH?
Answer
-
Inhibin.
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Relaxin.
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Progesterone.
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Estrogen.
Question 10
Question
The oestrous cycle is the time from the beginning of heat to the period of the next, but what does polyestrous describe?
Question 11
Question
What does Diestrous describe?
Question 12
Question
What does monoestrous describe?
Question 13
Question
Select an animal that is polyestrous.
Question 14
Question
Select an animal that is diestrous.
Question 15
Question
Select an animal that is monoestrous.
Question 16
Question
There are 3 phases of the estrous cycle, what is the first?
Answer
-
Follucular.
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Ovulation.
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Luteal.
Question 17
Answer
-
Ovulation.
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Follucular.
-
Luteal.
Question 18
Answer
-
Luteal.
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Follucular.
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Ovulation.
Question 19
Question
What step does this describe?
GnRH triggeres FSH release that stimulates growth of follicles in the ovary?
Answer
-
Follicular.
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Ovulation.
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Luteal.
Question 20
Question
What step does this describe?
BnHR and estrogen level changes will trigger LH release that causes ovulation.
Answer
-
Ovulation.
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Luteal.
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Follicular.
Question 21
Question
What step does this describe?
CL producing progesterone that affects the uterus lining.
Answer
-
Luteal.
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Ovulation.
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Follicular.
Question 22
Question
FSH and LH are secreted by the anterior pituitary gland but where is estrogen secreted from?
Question 23
Question
Throughout the cycle FSH it stimulates follicle development and what else?
Question 24
Question
Estrogen, what does it do?
Question 25
Question
Estrogen concentration peaks and stimulates the anterior pituitary to release LH and FSH then the LH surges to rapid increase and does what?
Answer
-
Ovulation stimulated by LH – follicule ruptures and egg is released.
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Ruptured follicle turns into corpus luteul.
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CL releases progesterone.
-
All.
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None.
Question 26
Question
Progesterone rises and what?
Answer
-
Progesteron inhibits FSH and LH.
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Uterus lining is maintained by progesterone.
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If no embryo, the CL breaks down and stops releasing progesterone.
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All of the above.
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None.
Question 27
Question
The concentration of progesterone then falls and...
Question 28
Question
Label this diagram with the correct hormones.
Answer
-
Progesterone.
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LH.
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Estrogens.
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FSH.
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FSH.
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Estrogens.
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Progesterone.
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LH.
-
LH.
-
FSH.
-
Progesterone.
-
Estrogens.
-
Estrogens.
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LH.
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FSH.
-
Progesterone.
Question 29
Question 30
Question
What is the first stage of the estrous cycle?
Answer
-
oestrus. – the female is receptive to the male.
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Metoestrus – formation of corpus luteum.
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Diestrus – corpus luteum fully functional.
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Proestrus – regression of corpus luteum, drop in progesterone, extends until start of oestrus.
Question 31
Question
What is the third stage.
Answer
-
Diestrus – corpus luteum fully functional.
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oestrus. – the female is receptive to the male.
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Metoestrus – formation of corpus luteum.
-
Proestrus – regression of corpus luteum, drop in progesterone, extends until start of estrus.
Question 32
Question
In cattle oestrus lasts 4-24hrs, and ovulates 30h after. When does metoestrus occur?
Answer
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2-4 days after oestrus, ovulation and formation of CL.
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around day 5, ends with regression of CL
Question 33
Question
Diestrus occurs on the 5th day, ends with regression of CL on day 16, if the cattle is not pregnant CL will degenerate, then proestrus occurs but what happens?