Reproductive Cycle Practice Quiz

Question 1

The dominant ovarian hormone during the luteal phase is _______.

Answer 1

a) progesterone

Question 2

_______ is not a polyestrous animal.
A) cow
B) sow
C) queen
D) ewe

Answer 2

D) ewe (seasonally polyestrous)

Question 3

In a cow, ovulation occurs at which stage of the estrous cycle?

Answer 3

Metestrus

Question 4

Both estradiol and progesterone are relatively low at which stage of the estrous cycle?

Answer 4

Metestrus

Question 5

All of the following are true about GnRH except ______ and _______.
A) GnRH is a master regulator of the HPG axis
B) GnRH neuron controls kisspeptin neurons
C) GnRH neurons are concentrated in the tonic and surge centers of the hypothalamus
D) Half-life of GnRH in the blood is very long (~2 to 4 days)
E) Pulsatile GnRH secretion is an absolute requirement for long-term stimulation of gonadotropin synthesis and secretion
F) Estradiol controls GnRH secretion through positive and negative feedback mechanisms by acting on the surge and the tonic center, respectively

Answer 5

B and D

Question 6

All of the following about puberty are correct except _______ and ______.
A) Acquisition of reproductive competence
B) Developmental period characterized by a broad range of physiologic changes necessary for the acquisition of adult sexual and reproductive maturity
C) Characterized by maturation of the genital organs
D) Considered an event that occurs suddenly
E) Involves transition from a state of ovarian activity to inactivity
F) Hypothalamic kisspeptin neurons play a key role in controllin pubertal onset via stimulation of GnRH/gonadotropin secretion in mammals

Answer 6

D and E

Question 7

All of the following are true about the cow estrous cycle except _______ and ________.
A) The duration of the estrous cycle is 21 days
B) It is calculated from the beginning of estrus to the ending of the subsequent estrus
C) Proestrus is the shortest period of the estrus cycle
D) Progesterone secretion is high during proestrus
E) Estradiol withdrawal results in metestrus bleeding
F) Regulated by endocrine signals between the hypothalamus, the pituitary, and the ovary

Answer 7

C and D

Question 8

True or false: FSH and LH act on the ovary and induce follicular development and maturation

Answer 8

True

Question 9

True or false: Diestrus is a well-defined period during which the female allows copulation.

Answer 9

False

Question 10

True or false: High progesterone prompts the uterus to prepare a suitable environment for embryo implantation.

Answer 10

True

Question 11

Match the stage of the estrous cycle to its characteristics.
A) Proestrus
B) Estrus
C) Metestrus
D) Diestrus
E) Anestrus
1) CL formation
2) formation of ovulatory follicles
3) maximum luteal function
4) lack of cyclicity
5) sexual receptivity

Answer 11

1) C
2) A
3) D
4) E
5) B