Reproductive Physiology Flashcards
The organ of copulation in males.
a. scrotum
b. prepuce
c. penis
d. sigmoid flexure
Penis
The following animals have intra-abdominal location of testis except:
a. dolphin
b. sperm whale
c. armadillo
d. camel
Camel
It transports sperm from rete testis to epididymis.
a. caput
b. pelvic urethra
c. vas deferens
d. efferent duct
Efferent duct
It is the most prominent structure within the male gonad where spermatogenesis takes place.
a. interstitial cells of Leydig
b. sustentacular cells
c. rete testis
d. seminiferous tubules
Seminiferous tubules
The cells of the interstitium in between the seminiferous tubules secrete testosterone. These interstitial cells are also called:
a. myoid cells
b. BTB cells
c. Leydig cells
d. Sertoli cells
Leydig cells
This hormone is needed to maintain high quantities of testosterone, thus, helping in the maintenance of the reproductive tract and allowing a much higher level of fertility to male animals.
a. Anti-Mullerian hormone
b. androgen
c. androgen binding protein
d. inhibin
Androgen binding protein
1: Anti-Mullerian hormone inhibits pituitary secretion that regulates spermatogenesis. 2: Inhibin’s main function is to prevent the development of female genital tract.
a. Both statements are true.
b. Both statements are false.
c. Statement 1-true, statement 2-false.
d. Statement 1-false, statement 2-true.
Both statements are false
Between ejaculations, sperm is primarily stored in the
__________.
a. seminal vesicle
b. epididymis
c. seminiferous tubules
d. vas deferens
Epididymis
This part of epididymis secretes forward motility protein.
a. caput
b. corpus
c. cauda
d. none of the choices
Cauda
Erection is controlled by the ________ division of the autonomic nervous system and ejaculation is controlled by the division of the autonomic nervous system ________.
a. parasympathetic-sympathetic
b. sympathetic-sympathetic
c. sympathetic-parasympathetic
d. parasympathetic-parasympathetic
parasympathetic-sympathetic
Semen is a product of ejaculation. It has the following
elements, except:
a. secretions from testis
b. secretions from epididymis
c. secretions from male accessory glands
d. none of the choices
None of the choices
Which of the following has correct chronological
arrangement?
a. spermatocytogenesis, spermiogenesis, meiosis
b. mitosis, meiosis, spermiogenesis
c. spermiogenesis, mitosis, spermatocytogenesis
d. meiosis, mitosis, spermatocytogenesis
mitosis, meiosis, spermiogenesis
The testes produce androgens, including testosterone, in
response to the following hormonal stimuli, except:
a. LH
b. FSH
c. prolactin
d. none of the choices
FSH
The following are known physiologic roles of testosterone
except:
a. Feather pigmentation, wattle and comb
b. Catabolic effect on skeletal muscles
c. Intricate plumage that attracts female
d. Anabolic effect on skeletal muscles
Catabolic effect on skeletal muscles
Boar taint is the characteristic odor of male pig. What is the
chemical composition of this odor?
a. methyl-p-hydroxybenzoate
b. methyl-p-hydroxybutyrate
c. 5alpha-androstenone
d. 5alpha- hydroxybenzoate
5alpha-androstenone
Puberty is:
a. the initiation of the ability to release mature germ
cells
b. the age when the animals are usually bred in
livestock operation.
c. accompanied by a decrease in GnRH secretion
d. the same with sexual maturity.
The initiation of the ability to release mature germ cells
The following animals have no ampulla except:
a. mice
b. tom
c. boar
d. guinea pig
Mice
Ampulla prepares the urethra for ejaculation by rinsing the
urine and raising the pH. Stallion, bull, and buck have all the male accessory glands except coagulating gland.
a. Both statements are true.
b. Both statements are false.
c. Statement 1-true, statement 2-false.
d. Statement 1-false, statement 2-true.
Statement 1-false, statement 2-true
Duration of ejaculation of bulls:
a. 10-15 sec
b. 30-40 mins
c. approx. 1 sec
d. 10-20 mins
Approx. 1 sec
Volume of ejaculate of stallion:
a. 70 (30-300) ml
b. 9 (2-15) ml
c. 0.03 (0.02-0.12) ml
d. 4 (2-10) ml
e. 250 (150 -500) ml
70 (30-300) ml
The hypothalamus produces gonadotropin-releasing hormone which stimulates the anterior pituitary gland to release:
a. estrogen and testosterone
b. FSH and LH
c. thyroid stimulating hormone and ACTH
d. all of the choices
FSH and LH
The functional part of the ovary which contains the follicles
and corpus luteum.
a. cortex
b. medulla
c. antrum
d. corpus albicans
Cortex
Which of the following is the correct sequence of development of
ovarian structure in a normal cycle?
a. corpus hemorrhagicum – Graafian follicle - corpus luteum – corpus albicans
b. Graafian follicle - corpus hemorrhagicum – corpus luteum – corpus albicans
c. corpus luteum – corpus albicans - Graafian follicle - corpus hemorrhagicum
d. Graafian follicle - corpus luteum - corpus hemorrhagicum – corpus albicans
Graafian follicle - corpus hemorrhagicum – corpus luteum – corpus albicans
Part of a mature follicle that displays FSH receptors
a. theca interna
b. granulosa cells
c. theca externa
d. basement membrane
Granulosa cells
Proestrus and estrus stage comprise the ______ of estrous
cycle.
a. follicular phase
b. luteal phase
c. quiescent phase
d. none of the above
Follicular phase
It is the post ovulatory phase of estrus cycle, wherein the
corpus luteum undergoes early development.
a. anestrus
b. metestrus
c. proestrus
d. diestrus
Metestrus
The period of maximal CL development:
a. diestrus
b. metestrus
c. proestrus
d. anestrus
Diestrus
Which stage of the bovine estrous cycle does bleeding
occur?
a. diestrous
b. estrous
c. proestrous
d. metestrous
Metestrous
The estrous cycle of cats lasts for:
a. 15-18 ds
b. 14-21 ds
c. 20-21 ds
d. 7 mos interval
14-21 ds
The estrous cycle of camels lasts:
a. 15-18 ds
b. 14-21 ds
c. 20-21 ds
d. 7 mos interval
20-21 ds
How long does estrus last in mares?
5-6 days
Which animal has the longest duration of estrus?
a. bitch
b. sow
c. queen
d. ewe
Bitch
In some animals, spontaneous ovulation occurs but the
corpus luteum only becomes functional after copulation.
These animals are:
a. rat and mouse
b. rabbit and cat
c. horse
d. cow
rat and mouse
What is the time of ovulation of sows?
a. 36-40 h after beginning of estrus
b. 12 h after end of estrus
c. Last day of estrus
d. Days 3-6 of estrus
36-40 h after beginning of estrus
What is the time of ovulation cows?
a. 36-40 h after beginning of estrus
b. 12 h after end of estrus
c. Last day of estrus
d. Days 3-6 of estrus
12 h after end of estrus
Implantation is achieved when the uterus is dominated by:
a. relaxin
b. estradiol
c. progesterone
d. prostaglandin
Progesterone
The following statements about progesterone are true except:
a. Progesterone inhibits uterine contraction during pregnancy.
b. Progesterone inhibits endometrial growth.
c. Progesterone is produced by CL and placenta.
d. Progesterone regulates the secretion of GnRH.
Progesterone inhibits endometrial growth
Which is the shortest in duration?
a. period of the placenta
b. period of the fetus
c. period of the embryo
d. period of the ovum
Period of the ovum
Which animal has a gestation period of 58-65 days?
a. dog
b. goat
c. cow
d. ferret
Dog
Which animal has the gestation period of 271-310
days
a. cow
b. sow
c. doe
d. mare
Cow
Which animal has the gestation period of 111-116
days.
a. cow
b. sow
c. doe
d. mare
Sow
Hormone responsible for the lysis of CL, at the same time it
stimulates uterine contraction and dilation of cervix.
a. cortisol
b. prostaglandin
c. relaxin
d. oxytocin
Prostaglandin
Which is not a direct effect of oxytocin during parturition?
a. stimulates uterine contraction
b. dilation of cervix
c. stimulates PGF2 alpha production
d. luteolysis
Luteolysis
Which stage of parturition is characterized by strong uterine
and abdominal contraction, increased intensity and frequency of contraction?
a. cervical dilation
b. expulsion of fetus
c. expulsion of placenta
d. all of the choices
Expulsion of fetus
Which is not true among the choices?
a. smaller breeds generally reach puberty at earlier age
b. puberty occurs earlier in the tropics
c. males reach puberty earlier than female
d. sheep/ewe are short day breeders
Males reach puberty earlier than female
Follicle stimulating hormone (FSH) is primarily responsible for
__________.
a. conversion of cholesterol to pregnenolone
b. testosterone production
c. maintaining the corpus luteum
d. spermatogenesis
Spermatogenesis
Evidence of pregnancy is afforded by hypertrophy of the
middle uterine arteries and a characteristic change in their
pulse wave, which is referred to as____.
a. fremitus
b. vibration
c. borborygmi
d. none of the choices
Fremitus
Females of which species are stimulated to begin estrous
cyclicity in response to decreasing daylight ?
a. cattle
b. pig
c. sheep
d. horse
Sheep
These hormones are galactopoietic except:
a. growth hormone
b. thyroid hormone
c. progesterone
d. glucocorticoids
Progesterone
Which is correct?
a. Sheep and goats: Four glands and only two teats.
b. Mare: Two glands and two teats.
c. Cow: Four glands and four teats.
d. none of the choices
Cow: Four glands and four teats.
