PRACTICE QUESTIONS

1. Active rescue of luteal activity through suppression of pulsatile prostaglandin synthesis and release by the production of embryonic signals must occur in which of the following species in order for a developing pregnancy to have the early progestational support essential for pregnancy maintenance? (Select more than one letter.)

a.

b. Dog

c. Goat

d. Horse

e. Pig

f. Sheep

2. In primates it has been established that estrogen pro­duction during much of pregnancy is a cooperative ven­ture between fetal adrenals and the placenta. The dom­estic species most extensively studied in this regard is the horse. In this species the main two interactive organs involved in the synthesis of estrogen during pregnancy arc the placenta and the:

a. Fetal adrenals

b. Fetal gonads

c. Fetal liver

d. Fetal hypothalamus

e. Fetal pituitary

3.

5. The hormone released by the passage of the fetus into the pelvic canal through the cervix is:

Which of the following hormones initiates the final process that eventually leads to parturition?

4. The hormone that initiates the myometrial contractile process that acutely initiates parturition is:

a. Maternal estrogen

b. Maternal progesterone

c. Fetal cortisol

d. Maternal relaxin

e. Maternal prostaglandin

f. Maternal oxytocin