AS434 – Lab 13 Questions

AS434 – Lab 13 Questions 1. What is the function of the spiral at the end of the pig catheter? 2. What is the likely advantage of using a cattle catheter with a spiral lock for the sheath over one which has an O-ring lock? 3. Cattle catheters are covered with a hard plastic sheath and then often an additional soft plastic sheath. What do you think is the purpose for having the second soft plastic sheath? 4. Why do some of the equine catheters have a soft plastic bulb at the end? 5. What is the volume of inseminate in the cow, pig and mare and how is the equipment different to accommodate these volume differences? 6. In what species is liquid semen the principal method of semen preparation used for artificial insemination? 7. What is the insemination target in the cow? 8. Describe artificial insemination in the cow. 9. Why do you think males differ in fertility when used for artificial insemination? 10. How might you combine artificial insemination and embryo transfer to produce twins in cattle? 11. Why might you choose to use liquid semen instead of frozen semen for artificial insemination of cattle? 12. What does the term definitive host mean and what is the definitive host for this organism? 13. What are the two types of humans for which this can cause dire consequences? 14. Visit the CDC parasitic diseases website in the other links of the Toxoplasmosis page and describe what you should do if you are at risk for a sever toxoplasmosis infection.