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Farm Animal Repro > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

What produces GnRH and serves as the central control center for reproductive hormones?

A

Hypothalamus

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2
Q

Where are the neurons located?

A

C

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3
Q

Which part secretes GnRH?

A

C) Tonic Center

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4
Q

Where is oxitocin secreated from?

A
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5
Q

Where is FSH, LH, and prolactin secreated from?

A

B) Anterior Lobe

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6
Q

This figure depicts the pathway by which steroid hormones from the ovaries and testes are synthesized. Which hormone is hormone A?

A
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7
Q

This figure depicts the pathway by which steroid hormones from the ovaries and testes are synthesized. Which hormone is hormone B?

A
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8
Q

This figure depicts the pathway by which steroid hormones from the ovaries and testes are synthesized. Which hormone is hormone C?

A
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9
Q

This figure depicts the pathway by which steroid hormones from the ovaries and testes are synthesized. What is molecule D?

A

Cholesterol

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10
Q

This figure depicts the pathway by which steroid hormones from the ovaries and testes are synthesized. What is molecule E?

A

An enzyme that catalyzes a metabolic reaction. ie

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11
Q

What does the suffix “tropin” mean as in gonadotropin?

A
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12
Q

What is the female target tissue for lutenizing hormone?

A
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13
Q

Luteolytic hormones cause destruction of the corpus luteum. The major luteolytic hormone is:

A

Prostaglandin F2Alpha

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14
Q

What is an example of a steroid hormone that has a strong negative feedback at the hypothalamus thus suppressing GnRH?

A
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15
Q

What is the typical age of puberty for a heifer?

A

11 months

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16
Q

What is the typical age of puberty for a Gilt?

A
17
Q

What is the typical age of puberty for a ewe?

A
18
Q

What is the typical age of puberty for a mare?

A
19
Q

Name the four biochemical classifications of hormones.

A

Peptides, Steriods, Glycoproteins, Prostaglandin

20
Q

What is the primary target cell for follicle stimulating hormone in the male?

A

Sertoli Cells

21
Q

Beginning with time of peak estradiol concentrations, what is the correct chronological order of stages of the estrous cycle?

A
22
Q

This figure depicts phases, events, and hormonal changes of a 21-day estrous cycle.

The 2 black bars depict what estrous cycle phase?

A

Follicular Phase

23
Q

This figure depicts phases, events, and hormonal changes of a 21-day estrous cycle.

What event is depicted by the narrow green bar.

A

Ovulation

24
Q

This figure depicts phases, events, and hormonal changes of a 21-day estrous cycle.

Changes in what steroid hormone is depicted by the solid orange line?

A

Progesterone

25
Q

This figure depicts phases, events, and hormonal changes of a 21-day estrous cycle.

Changes in what steroid hormone is depicted by the red dotted line?

A

Estradiol

26
Q

Which of the following statements regarding the estrous cycle is INCORRECT?

During the follicular phase in a sow, one would expect to observe large antral follicles and increased secretion of estradiol.

The luteal phase is composed of the metestrus and diestrus stages

One would expect to observe sexual receptivity and lordosis behavior during diestrus

To be in the diestrus stage, a cow must have ovulated and formed a corpus luteum

A
27
Q

In the cow, how many follicles typically ovulate during one 21 day estrous cycle?

A

One

28
Q

Name the term (is a noun) that is the period of female sexual receptivity and is also known as “heat”. Spelling must be correct.

A

Estrus

29
Q

Which stage includes the period between ovulation and the formation of a corpus luteum (pl. corpora lutea)? During this stage both estradiol and progesterone are relatively low.

A
30
Q

What event is occurring at the time of the estrous cycle indicated by the arrows?

A

Ovulation

31
Q

What type of Estrus cylce does a dog have?

A

Monoestrus

32
Q

What type of Estrus cylce does a cow have?

A

Polyestrus

33
Q

What type of Estrus cylce does a mare have?

A
34
Q

What type of Estrus cylce do sheep and goat have?

A
35
Q

What type of Estrus cylce does a queen have?

A
36
Q

What type of Estrus cylce does a pig have?

A

Polyestrus

37
Q

If a woman with a typical 28-day menstrual cycle began sloughing her endometrium 10 days ago, in how many days would you expect her to ovulate?

A

4 days

38
Q

Reflex ovulators differ from spontaneous ovulators in that reflex ovulators require stimulation of the vagina and (or) cervix (occuring during copulation) for ovulation to occur. What hormone from the hypothalamus is released because of the vaginal or cervical stimulation?

A

GnRH

39
Q

What are three things that can cause anestrus to occur?

A

Suckling by an animal’s own offspring,

Season,

Negative energy balance

Farm Animal Repro (2 decks)

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