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ANSC 463 Repro Final

NDSU Reproduction and Physiology

QuestionAnswer
The probe of an ultrasound system produces what type of waves? sound waves
Fluid filled structures appear black, and dense tissues appear white on an ultrasound screen. Give me one example of a fluid filled structure in the cow reproductive tract. ovarian follicle
Fluid filled structures appear black, and dense tissues appear white on an ultrasound screen. one example of a dense tissue in the cow reproductive tract. cervix
Name one non reproductive use of ultrasonography in the livestock industry. determining fat depth
List one landmark you feel for when palpating a cow/heifer. pelvic floor
At what stage of pregnancy were the heifers we palpated in class? 0 days
Name one reproductive use of ultrasounography in the livestock industry. embryo sexing
Caruncles are only present in the uterus when a cow is NOT pregnant. true or false False
The uterus of a cow remains the same size throughout her life? true or false true
when palapating an animal it is important to feel ______ rather than forward. down
Ultrasound probes are available in varying frequencies. What is a common frequency for ultrasounding for back fat? 3.0 MHz
Ultrasound probes are available in varying frequencies. What is a common frequency for ultrasounding the ovary? 7.5 MHz
In vitro fertilization allows for the production of __________________, embryos from donors that cannot produce embryos in a traditional embryo production system, and ___________________. more offspring per donor, embryos at times of the year when seasonally breeding animals perform poorly.
In vitro fertilzation calls for three steps a)_________ b)in vitro fertilization c)________ In Vitro Maturation In Vitro Culture
Maturation of the oocyte naturally occurs in the? therefore, the buffers used for in vitro maturation are designed to mimic the environment of what anatomical structure? follicle
Name one approach to obtain a supply of oocytes. collection of oocytes from the ovaries from slaughterhouse
In vitro embryo production results in ________________ (increased/decreased) embryo viability and _______________ (increased/decreased) embryonic and fetal mortality compared to in vivo embryo production decreased, increased
Dr. Grazul-Bilska listed some special features of an embryology lab. Name two of these special features (think equipment, temperature, etc.). non florescent lights, increased room temperature
When collecting oocytes from follicles, what percentage of oocytes can you expect to recover? 90-100%
TRUE or FALSE: In vitro fertilization is a good option for humans having problems with natural embryo production. True
What happens to the cumulus oophorus (or cumulus oocyte complex) during oocyte maturation? grows thicker
The ovarian structure and pattern of hormones associated with Diestrus CL Maximal progesterone; minimal estrogen
The ovarian structure and pattern of hormones associated with Proestrus CA + growing follicles Increasing estrogen; decreasing progesterone
The ovarian structure and pattern of hormones associated with Estrus Ovulatory follicle Maximal estrogen;minimal progesterone
The ovarian structure and pattern of hormones associated with Metestrus CH Increasing progesterone;decreasing estrogen
The length of the estrous cycle and the type of estrous cycle that a cow displays is: 21 days Polyestrous
The length of the estrous cycle and the type of estrous cycle that a Ewe displays is: 17 days Seasonally polyestrous
The length of the estrous cycle and the type of estrous cycle that a Bitch displays is: 6 months Monoestrous
The length of the estrous cycle and the type of estrous cycle that a Mare displays is: 21 days Seasonally polyestrous
The length of the estrous cycle and the type of estrous cycle that a Queen displays is: 17 days Polyestrous
The length of the estrous cycle and the type of estrous cycle that a Sow displays is: 21 days Polyestrous
Created by: 100000016461335
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