Exam 1

Question 1

Purposes of reproduction

Answer 1

Perpetuation of species
To provide food
Genetic improvement

Question 2

Ductless glands, secrete directly into blood

Answer 2

Endocrine glands

Question 3

Ducts, secrete externally

Answer 3

Exocrine glands

Question 4

What glands secrete hormones and where do they go

Answer 4

Endocrine glands, carried by blood to specific target tissues where they evoke physiological adjustments

Question 5

Properties of hormones

Answer 5

Effect specialized tissues containing receptors
Are not chemically unique
Have variable speeds of reaction
Active at very low concentrations

Question 6

Hormones from anterior pituitary

Answer 6

LH, FSH, prolactin, and adrenocorticotropic hormone

Question 7

FSH actions in females

Answer 7

Follicle growth
Estrogen production (in conjunction with LH)
Inhibin production

Question 8

FSH actions in males

Answer 8

Spermiogenesis
Inhibin production
Androgen-binding protein

Question 9

Action of LH in females

Answer 9

Maturation of follicle
Ovulation
CL formation
Progesterone production (luteotropic effect)

Question 10

Action of LH in males

Answer 10

Testosterone production (from leydig cells )

Question 11

What kind of hormone is prolactin

Answer 11

Lactotropin

Question 12

Actions of prolactin

Answer 12

Milk synthesis
Development of mammary glands
Maternal behavior

Question 13

What cells produce ACTH

Answer 13

Corticotrope

Question 14

Action of ACTH

Answer 14

Release of glucocorticoids (cortisol) from adrenal glands

Question 15

Hormones from ovary

Answer 15

Estrogens, progesterones, Inhibin, and relaxin

Question 16

site of production and some actions of estrogen

Answer 16

theca and granulosa cells of follicle; uterine contractions, positive and negative feedback on gonadotropins, duct growth of mammary glands, secondary sex characteristics

Question 17

site of production and action of progesterone

Answer 17

luteal cells of CL; maintains pregnancy

Question 18

site of production for inhibin (folliculostatin) and actions

Answer 18

granulosa cells of follicle, found in follicular fluid; suppresses release of FSH

Question 19

site of production for relaxin and actions

Answer 19

luteal cells of CL during pregnancy (also placenta and uterus); relaxes body during pregnancy

Question 20

hormones from testis

Answer 20

androgens (testosterone), ABP, and inhbin

Question 21

site of production and action of testosterone

Answer 21

Leydig cells of testis (stimulated by LH); spermatocytogenesis and male sexual behavior

Question 22

site of production and action of inhibin

Answer 22

Sertoli cells of testis, suppressed FSH

Question 23

site of production and action of ABP

Answer 23

sertoli cells; binds androgens to maintain high conc. for spermatogenesis

Question 24

Hormones from placenta

Answer 24

estrogens, progestins, relaxin, human chorionic gonadotropin (hCG), pregnant mare serum gonadotropin (PMSG or eCG), placental lactogen, and interferon

Question 25

site of production and action for hCG

Answer 25

syncytiotrophoblastic cells of trophoblast; converts CL of menstrual cycle to CL of pregnancy

Question 26

site of production and action of PMSG/ eCG

Answer 26

endometrial cells of mares placenta ( get from the separation of serum); formation of accessory and primary CL during pregnancy, FSH-like in domestic animals other than the mare, stimulates excessive follicular development in domestic animals other than mare

Question 27

site of production and action of placental lactogen

Answer 27

placenta; developes mammary gland for milk production, regulation of maternal nutrients to fetus, regulation of fetal growth

Question 28

where is placental lactogen highest

Answer 28

last trimester of pregnancy (higher in dairy cattle)

Question 29

What is interferon also known as

Answer 29

OTP and bTP

Question 30

site of production and action of interferon

Answer 30

placenta of bovine and ovine; role in maternal recognition

Question 31

hormones from uterus

Answer 31

relaxin, prostaglandin (PGF2a and PGe2)

Question 32

precursor to PGF2a

Answer 32

arachidonic acid

Question 33

site of production and action of PGF2a

Answer 33

endometrial cells of the uterus and vesicular glands in male; regression of CL, constriction of blood vessels, smooth muscle contraction for sperm and ovum transport, stimulates gonadotropin release

Question 34

uses of PGF2a

Answer 34

synchronization of estrus and ovulation in cows and mares, the luteolytic effect of CL, abortion in feedlot cattle

Question 35

precursor to PGE2

Answer 35

arachidonic acid

Question 36

what kind of hormone if PGE2

Answer 36

lipid

Question 37

Hormones from adrenal cortex

Answer 37

Glucocorticoids (cortisol)

Question 38

site of production and action of cortisol

Answer 38

adrenal cortex; initiation of parturition, synergizes with prolactin to initiate milk synthesis, reduces inflammation

Question 39

what is compudose used for

Answer 39

increase anabolic effect

Question 40

what is trenbolone acetate "revalor" used for

Answer 40

increase weight gain and feed efficiency

Question 41

what is melengestrol a compound of

Answer 41

progestin