ADSC 2010: Test 3
64 Cards in this Set
| Front | Back |
|---|---|
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The front two quarters of a dairy cow contributes about 40% of the milk produced by the udder
T/F
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TRUE
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Relaxin causes relaxation of the cervix during estrus to allow sperm to move through the cervix for fertilization.
T/F
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FALSE
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It is important for the dairy cow to stay with its mother for the first 7 days of its life to ensure adequate colostrum intake.
T/F
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FALSE
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In the female repro. tract, the fertile life of the ova is usually shorter than that of the sperm.
T/F
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TRUE
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The sigmoid flexure can be found in the ram, bull, and buck but not the stallion.
T/F
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TRUE
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Iodine is necessary for the proper function of the thyroid hormones.
T/F
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TRUE
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There is normally no exchange of milk between the four quarters of the cows udder.
T/F
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TRUE
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The hormone responsible for maintaining pregnancy, Prostaglandin, is produced by the placenta and the corpus luteum of the cow.
T/F
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FALSE
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As a "rule of thumb" beef and dairy heifers should be bred after they have attained 65% of their mature weight.
T/F
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TRUE
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The incomplete milking of a cow can cause a decline in milk production.
T/F
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TRUE
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A pregnant cow that has its ovaries removed during the last trimester of the pregnancy has her ability to cary the fetus through the term.
T/F
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FALSE
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Most breeds of sheep mate in the spring when the days are getting longer.
T/F
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FALSE
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Estrumate, a prostaglandin-based synchronizing drug, requires multiple injections to synchronize the entire herd.
T/F
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TRUE
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Estrogen is the hormone responsible for the alveolar development in the mammary gland.
T/F
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FALSE
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Increasing the amount of roughage fed to the dairy cow will increase the amount of acetate produced in the rumen which will refuse milk fat levels.
T/F
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FALSE
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A declining level of progesterone in the blood means that an LH surge will occur during 12 to 24 hours.
T/F
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TRUE
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Approx. 20% more milk will be obtained with four times a day milking compared to three times a day milking.
T/F
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TRUE
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Milk production will tend to be lower in dairy cows that calve during April and May compared to the cows calving in October-Novmeber.
T/F
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TRUE
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The mare can conceive during foal heat.
T/F
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TRUE
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In the cotyledonary type of placental attachment, cotyledons from the fetal tissue and caruncles from the maternal tissue from placentones will allow the transfer of nutrients from dam to fetus.
T/F
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TRUE
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The main reason for the breeding of young female (heifers, gilts, etc.) before the reminder of the herd is to allow for a longer ______-_______ ___________ before re-breeding.
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Post-Patrum interval
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_____ _____ _____ is the muscle that forms the sigmoid flexure in the bull and the boar.
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Retractor penis muscle
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The two main ligaments that support the cow's udder are the ______ ______ and the _______ _______.
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median suspensory and lateral suspensory
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The four parts of the oviduct are the.
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-fimbriae
-ampulla
-ishtmus
-infundibulum
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The three members of the placenta are the _______, which is the closest to the fetus, the _________, which is the middle membrane, and the _______, which is closest to the uterus.
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aminon
allantois
chorion
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The ____ _____ is the time in which the dairy cow is not milked so that her udder can recover and so that the cow can replenish her store of body fat.
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dry period
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_____ ______ is the primary hormone that causes ovulation, and the ______ _______ ______ is the primary hormone that causes the growth of the follicle.
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Lutenizing Hormone
Follicle stimulating hormone
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The average gestation length of the cow is ____ _____, when the sows gestation length is _____ _____, and ewes is _____ _____.
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275 days
234 days
114 days
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________ is the hormone produced by the uterus that signals the cow that she is not pregnant, and causes regression of the _____ ______.
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Prostaglandin
Corpus Latuem
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The persistency of the cow is her _______________ divided by her ___________.
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months milk production
last months milk production
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The hormone ________ is released when a dairy cow is stressed and this hormone can cause a decrease in the milk received from the cow by blocking the action of the hormone ________.
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Adrenaline
Oxytocin
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The _____ is the female with the shortest cycle, while the _____ is the female that ovulates post-estrus.
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Ewe
Cow
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________- this synchronization drug used in the CIDR, is given to the female for a period of time and then removed to bring about estrus.
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Progesterone
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_________- the dams first milk is high in these proteins.
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Immunoglodins
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________- these muscle cells in the mammary gland are responsible for the milk let-down.
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Myoepithelial
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________- the cell layer of the blastocyst develops into the placenta.
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Trophoblast
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______- main cause of death in young calves.
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Scours
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________- the non-surgical process of collecting embryos from a donor cow following AI.
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Flushing
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_______ ______- mature follicle, near the ova, following ovulation.
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Graafian follicle
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_______- the site of semen deposition in the cow by the bull.
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Vagina
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______/_____- the best description of the changes in US milk production and dairy cow number in the past 50 years.
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Increase/Decrease
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_______ _____ ______- synchronizing drug that causes the release of the lutenizing hormone.
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Gonadotropin releasing hormone
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_______- a ewe has this type of uterus, which has a large body and small horns.
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Bipartite
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_____-_____ _____- the sire of fertilization in the horse.
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Ampulla-isthmus junction
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___ _____- earliest recommended age in which heifers should be bred.
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15 months
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______- major disease that impacts the dairy industry and results in udder inflammation.
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Mastitis
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__ ___- number of days used for the cows lactation record.
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305 days
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____- the section of the sows reproductive tract is made up of collagenous rings and acts as a barrier to the outside environment.
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Cervix
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_____- this component of milk increases in concentration as milk transitions from colostrum to whole milk.
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Lactose
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______ _______- this structure in the immature ruminant that shunts milk pass the rumen and into the abomasum.
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esiphygeal groove
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______- the basic secretory unit of the mammary gland.
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Avelous
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________- the term that describes the maturation of the sperm in the females reproductive tract.
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Capacitation
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______- hormones that stimulates and maintains milk production.
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Prolactin
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_____- sow and mares have this type of placental attachment.
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Diffuse
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_______- term used to describe calving difficulty associated with large birth weights.
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Dystocia
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_______- cell layer of the inner mass that will develop in the digestive tract.
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Endoderm
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______- site for semen accumulation near the posterior end of the vas deferens that is absent in the boar.
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Ampulla
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Six factors that affect milk production in dairy cattle.
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Breed
Age
Size
Season
Disease
Mastitis
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Three ways to reduce the birth weight in beef cattle.
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Genetic, look for a lower birthweight, control nutrition in the last trimester, and calve in the fall rather than the summer months- trying to reduce dystocia in the calf.
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Five functions of the placenta.
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Nutrition, respiration, hormone regulation, waste removal and protection.
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3 advantages of AI
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helps keep track of the record breeding, superior genetics, and helps eliminate disease.
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Three main signs that sow is exhibiting estrus
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erect ears, stand hand pressure, restlessness/vocalization
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If you are checking heat twice a day, when would you breed the sow exhibiting estrus?
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breed 12 hours after detection and 12 hours later
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List the accessory sex glands in the boar.
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Prostate gland, coupers gland, seminal vesicle
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Study Guide: Final Exam