repro 1

Question 1

what are the 2 polypeptide hormones secreted by the hypothalamus

Answer 1

GnRH secreted by hypothalamus → anterior pituitary
Oxytocin secreted by hypothalamus → posterior pituitary

Question 2

PGF2α is a ?

Answer 2

prostaglandin, synthesized from arachidonic acid

Question 3

how do steroids have short half lives but long duration of action

Answer 3

due to transcriptional activation

Question 4

interstitial cells aka ________ make _______ and are stimulated by _____?

Answer 4

leydig, testosterone, LH

Question 5

sustenacular cells aka ________ make _______ are are stimulated by _______ ?

Answer 5

Sertoli cells
Make inhibin
Stimulated by FSH

Question 7

what are the uses of GnRH & human chorionic gonadotropin (hCG) in male dogs?

Answer 7

• Correction of cryptorchidism
• Determine if remnant testicular tissue in castrated dogs/cats

Question 8

when using GnRH & or human chorionic gonadotropin (hCG) to treat cryptorchidism in canines, what is the biggest rule to follow

Answer 8

Has to be administered w/in the normal period of testicular descent (first 8 wks)!!

Question 9

why is use of GnRH & human chorionic gonadotropin (hCG) in males to correct cryptorchidism not slay at all

Answer 9

• No data to show its efficacy
• No reports that this reduces risk of sertoli cell tumors or saves fertility
• Cryptorchidism is still heritable (do you really want to breed that dog?)