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Animal Reproduction > Reproductive Cycles of the Female MCQ's > Flashcards

Reproductive Cycles of the Female MCQ's Flashcards

1
Q

Estrous referes to the length of the cycle. For example 21 days in the bovine.
True
False

A

True

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2
Q

Estrus refers to the period of time when a female is receptive to a male. For example, the bovine is in estrus for 18 hours on the average.
True
False

A

True

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3
Q

Which of the following species have polyestrus estrous cycles throughout the year? (check all that apply)
Bovine
ovine
mare
porcine
dog
mouse

A

Bovine
porcine
mouse

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4
Q

Which of the following species are monestrous? (check all that apply)
Bovine
ovine
equine
porcine
dog
mouse

A

dog

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4
Q

Which of the following species are seasonally polyestrus? (check all that apply)
Bovine
ovine
equine
porcine
dog
mouse

A

ovine
equine

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5
Q

Which of the following species have estrous cycles that are 21 days in length. (check all that apply)
Bovine
ovine
equine
porcine
dog
mouse

A

Bovine
equine
porcine

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6
Q

Which of the following species ovulate after the end of estrus? (check all that apply)
Bovine
ovine
equine
porcine

A

Bovine

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7
Q

The act of mating induces a GnRH surge that triggers ovulation in the ferret, cat and camel.
True
False

A

True

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8
Q

The act of mating in the hamster, mouse or rat causes the release of prolactin which maintains the corpus luteum.
True
False

A

True

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9
Q

During proestrus
the follicle enlarges.
estrogen decreases
bleeding occurs in cattle.
progesterone is high.

A

the follicle enlarges.

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10
Q

During diestrus
progesterone is high.
ovulation occurs in the cow.
endometrial glands begin to grow.
estrogen levels peak.

A

progesterone is high.

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11
Q

During estrus in the cow
estrogen is increasing.
estrogen is decreasing.
FSH is low due to feedback from inhibin.
GnRH is inhibited by progesterone.

A

estrogen is decreasing.

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12
Q

During proestrus which of the following occur? (select all that apply)
The preovulatory follicle is producing large amounts of estrogen and inhibin.
endometrial glands are initiating their growth.
The corpus luteum is producing progesterone.
The LH surge occurs and uterine motility is high.
The vascularity of the female reproductive tract is increasing.

A

The LH surge occurs and uterine motility is high.

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13
Q

During metestrus which of the following occur? (check all that apply)
estrogen is low.
the corpus hemorrhagicum is present.
progesterone is high.
blood may be noticed on the vulva or tail.

A

estrogen is low.
the corpus hemorrhagicum is present.
blood may be noticed on the vulva or tail.

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14
Q

The length of estrus in the cow is 18 hours while it is 6 - 8 days in the horse.
True
False

A

True

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15
Q

Which of the following is the principle cause of gestational anestrus.
estrogen is low.
LH and FSH will not surge.
progesterone is present and has negative effects on GnRH.
oxytocin is being released by the CL and prevents PGF release from the uterine endometrium.

A

progesterone is present and has negative effects on GnRH.

16
Q

During the transition from the non-breeding to breeding season in the ewe which of the following is occuring?
Melatonin is decreasing.
Melatonin is decreasing the sensitivity of the hypothalamus to estradiol positive feedback.
GnRH pulse frequency and amplitude increase in response to increasing melatonin levels and estradiol positive feedback.
GnRH pulse frequency and amplitude decrease in response to progesterone release?

A

GnRH pulse frequency and amplitude increase in response to increasing melatonin levels and estradiol positive feedback.

17
Q

Lactational anestrus occurs in the sow.
True
False

A

True

18
Q

Decreased nutrition can cause a reduction in GnRH pulse amplitude and frequency and thus causes anestrus.
True
False

A

True

19
Q

The human menstrual cycle is 21 days in length.
True
False

A

False

20
Q

In the human, follicular growth of antral follicles begins during which of the following times?
Menses
follicular phase
luteal phase
estrus

A

Menses

21
Q

In the human, ovulation occurs on day 10 of a normal mestrual cycle.
True
False

A

False

22
Q

In an abnormal mestrual cycle, which of the following phases most often changes in length.
Menses
follicular
luteal phase

A

follicular

23
Q

Growth of the human endometrium is initiated by increases of estrogen coming from growth of antral follicles.
True
False

A

True

24
Q

Which of the following hormones decrease to cause menses in the human? (check all that apply)
Estrogen
FSH
LH
progesterone

A

Estrogen
progesterone

25
Q

The length of the human mestrual luteal phase is normally which of the following?
5 days
9 days
14 days
28 days

A

14 days

Animal Reproduction (17 decks)

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