The following review questions are intended to point out
 out and help you understand some of the major points in
 the recommended reading material in Scientific Farm Animal
 Production (8th Ed.) by R. E. Taylor and T. G. Field.
     
CHAPTER 19:  Lactation
    

 19-1. Compare the mammary gland structure and location for the cow,
       ewe, nanny, mare, and sow.

 19-2. Look at figure 19.2; identify and give the purpose or function
       of the following:  (Your notes may be helpful.)

       Median (middle) suspensory ligament

       Milk ducts

       Gland cistern

       Teat cistern

       Streak canal

       Alveolus

       Epithelial cells of alveolus

       Alveolus lumen

       Myoepithelial cells

 19-3. Explain the roles of estrogen, progesterone, and growth hormone
       in growth and development of the mammary gland.

 19-4. Explain the role of oxytocin in milk let-down.  What stimulates
       the release of oxytocin, and from where is it released?

 19-5. What can inhibit the action of oxytocin?  What hormone is
       involved in inhibiting oxytocin (from your notes)?

 19-6. Which hormones are important in maintaining lactation
       (stimulating milk production)?

 19-7. When does milk production peak for a typical 305-day lactation? 
       (See your notes and Figure 19.4 A; the 4-6 weeks statement in
       the text is a little early.)  What is meant by "persistency"? 

 19-8. What happens when a cow becomes dry?

 19-9. What role does each of the following have in determining the
       milking ability of a cow?  (The text gives specific examples and
       discussion of each.)

       Genetics

       Nutrition

       Health of the cow and mammary gland

       Ability of the young to take milk from the cow

            Inbreeding vs. crossbreeding

            Male vs. female offspring

            Single vs. multiple births

       Age of the dam

19-10. How does the newborn get its passive immunity?  How long does
       the newborn have the ability to get passive immunity in this
       manner?