ANSC 3261 / SAAS 261

FINAL EXAM

Dec 13, 2016NAME: ______

SECTION A. Define or identify the following, relating your answer to some aspect of the dairy industry. Remember that translating abbreviations is only half the job! (2 pts @):

1)Thyroprotein

2)Alveolus

3)GnRH

4)Cricoid Fold

5)DCAD

6)CIP

7)Transition Period

8)FIL

9)NDF

10)PTA

11) SCC

SECTION A. (cont)

12)AcceleratedGrowth Program

13) BSE

14) TPI

15)Golgi

SECTION B. Indicate whether each of the following statements is true or false by circling either the T or F, respectively. If you change your mind, please make your final choice obvious. (1 pt @)

TF 1)Estrogen, progesterone, testosterone, glucocorticoids and mineralocorticoids are all steroid hormones.

TF 2)The MILC program was replaced by the MPP.

TF 3)Feed costs are usually about 50% of the total cost of producing milk.

TF 4)Many cows are infected with BLV, but very few show symptoms.

TF 5)Rumen microflora break down carbohydrates to glucose which is then absorbed in the digestive tract to meet the cow's energy needs.

TF 6)Steriod hormones function through the "second messenger" system.

TF 7)DHIA began as a farmer organization in Michigan in 1905 to provide unbiased milk production data.

TF 8)DMI is limited during late lactation by the size of the rumen.

TF 9)Milking cows in an average parlor is at least twice as efficient as milking in a tie-stall barn.

TF 10)The hundredweight milk price that dairy producers received is remarkably stable.

TF 11)Prions can cause pneumonia in calves.

TF 12)Lipase digests protein in the small intestines.

SECTION C. Fill in the blanks and/or indicate (circle or underline) the correct choice in the following statements. Please make sure you decisively indicate your answer and that circles or underlines are not ambiguous. (1 pt @)

1.______, from the [corpus luteum, uterus, posterior pituitary] is the trigger event that causes [pregnancy, luteolysis, ovulation] in cows.

2.Total US milk production in 2015 was ______lbs.

3.The rule of thumb to reduce the probability of inbreeding depression in dairy cattle is to avoid any matings that result in offspring with an inbreeding coefficient great than ______%. Thus, the closest (ancestrally speaking) bull that could be considered in potential matings would be a cow's [grandsire, great-grandsire, great-great grandsire] (assume no other common ancestors exist).

4.The cowside test for mastitis that involves mixing milk with a reagent in a four-section paddle is called ______. This method measures ______.

5.The three major components of crude fiber are ______, ______and ______.

6.Growth hormone release from the ______is regulated by the interaction of ______and ______, both of which are produced in the ______.

7.Indicate the Class designation (in order) of: cheese, butter, chocolate milk. ______, ______, ______.

8.The breakeven point for the modern version of the milk-feed price ratio is ______, while for the traditional version the breakeven point is ______. The difference between the two is that ______.

SECTION D. Answer these questions on the lined paper provided and please write neatly. Thanks. Note that answers to questions #1 is 5 points, while answers to #2 and #3 are worth 10 points.

1)List five different types of information dairy operators should record and briefly indicate the importance of each.

2)Why is it important for a calf to receive colostrum as soon after birth as possible? How long before feeding colostrum becomes ineffective? Why? Describe the colostral component involved (hint: draw a diagram and identify functional aspects!)

3)Contrast milking efficiency of flat barns (any type of stanchion or tie stall), herringbone and parallel parlors. How do herringbone parlors improve on flat barns? How do parallel parlors improve on shortcomings inherent in herringbone designs?

SECTION E. Fill in the blanks in the following table so that your responses on a given line pertain to the information provided. Note that in some situations more than one correct response could be possible. Be sure that your responses are consistent in describing the same hormone/source/target tissue and effect. (1 pt @)

Hormone Source Target Tissue Effect

______Decreased blood Ca++ concentration__

______Synthesis of glucocorticoids______

______Myoepithelial cell______

______Inhibits PRLrelease______