Exam 2

Question 1

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

Answer 1

Hypothalamus

Question 2

Where are the neurons located?

Answer 2

C

Question 3

Which part secretes GnRH?

Answer 3

C) Tonic Center

Question 4

Where is oxitocin secreated from?

Question 5

Where is FSH, LH, and prolactin secreated from?

Answer 5

B) Anterior Lobe

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Answer 9

Cholesterol

Question 10

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

Answer 10

An enzyme that catalyzes a metabolic reaction. ie

Question 11

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

Question 12

What is the female target tissue for lutenizing hormone?

Question 13

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

Answer 13

Prostaglandin F2Alpha

Question 14

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

Question 15

What is the typical age of puberty for a heifer?

Answer 15

11 months

Question 16

What is the typical age of puberty for a Gilt?

Question 17

What is the typical age of puberty for a ewe?

Question 18

What is the typical age of puberty for a mare?

Question 19

Name the four biochemical classifications of hormones.

Answer 19

Peptides, Steriods, Glycoproteins, Prostaglandin

Question 20

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

Answer 20

Sertoli Cells

Question 21

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

Question 22

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

The 2 black bars depict what estrous cycle phase?

Answer 22

Follicular Phase

Question 23

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

What event is depicted by the narrow green bar.

Answer 23

Ovulation

Question 24

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?

Answer 24

Progesterone

Question 25

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?

Answer 25

Estradiol

Question 26

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

Question 27

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

Answer 27

One

Question 28

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

Answer 28

Estrus

Question 29

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.

Question 30

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

Answer 30

Ovulation

Question 31

What type of Estrus cylce does a dog have?

Answer 31

Monoestrus

Question 32

What type of Estrus cylce does a cow have?

Answer 32

Polyestrus

Question 33

What type of Estrus cylce does a mare have?

Question 34

What type of Estrus cylce do sheep and goat have?

Question 35

What type of Estrus cylce does a queen have?

Question 36

What type of Estrus cylce does a pig have?

Answer 36

Polyestrus

Question 37

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?

Answer 37

4 days

Question 38

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?

Answer 38

GnRH

Question 39

What are three things that can cause anestrus to occur?

Answer 39

Suckling by an animal's own offspring, Season, Negative energy balance