ANS3319C- Last Minute Memorization

eCG is like what other hormone in mares?

LH; ovulation

eCG is like what other hormone in non-mare species?

FSH like; extra follicles

hCG acts like what other hormone?

LH; help ovulate

In which species does the CL produce progesterone throughout the whole pregnancy?

sow and rabbits

In which species does the placenta not take over progesterone production until the 8th month?

cow

How is cortisol produced in the fetus to initiate birth?

fetal adrenal corticotrophin targets the adrenal gland

What is the axis that is required for cortisol production?

fetal hypothalamus-pituitary-adrenal axis

What structures produces relaxin to stretch pelvic ligaments?

CL

What induces the fetus to move lower into cervix which drives additional myometrial contractions?

fetal hypoxia

What covers the fetus at birth?

amnion

What two veins drain erectile tissue?

deep dorsal vein and superficial vein

What species have 1 fraction?

ram and bull

What species have 2 fractions?

stallion

Which species have 3 fractions?

boar and dog

What is the 3rd fraction in the boar?

gel

What is the 3rd fraction in the dog?

prostate fluid

Site of semen deposition in natural mating of cow, sheep, rabbit, primate, dog, cat, rodent

cranial vagina

Site of semen deposition in natural mating of pig

cervix

Site of semen deposition in natural mating of horse

cervical lumen into uterus

Site of semen deposition in AI for horse, cow, and sheep

transcervical

Site of semen deposition in AI for sow?

intracervical

Site of semen deposition in AI for dog and cat?

intravaginal

What structure produces oxytocin?

CL

Which zona binding proteins are structural?

ZP1 and ZP2

What 2 features in sperm are required so chromosomes of the male pronuclei can pair with female pronuclei?

loss of protamines and reduction of disulfide bonds

What molecule reduce bisulfide bonds to decondenate DNA?

glutathione

increase cell number without increasing cell mass through mitosis; which forms blastomeres

cleavage

3 factors that governs hatching of blastocyst

1. blastocyst growth and fluid accumulation

2. enzyme production by trophoblast cells

3. Blastocyst contractions intermittent pressure pulses

Enzymes produce by trophoblast cells does what

weakens zona

Blastocyst growth and fluid accumulation and blastocyst contractions do what 

increase pressure

2 types of cells in ICM

epiblast and hypoblast

Hypoblast create what kind of cells

yolk sac

Epiblast give rise to what other cells

endoderm, ectoderm, mesoderm

endoderm forms

interior linings of our two tubes, GI tract, respiratory tract, endocrine glands, urinary tract

Mesoderm forms

connective tissue, muscle, gonads, RBC

Ectoderm forms

nervous system and skin

4 extraembryonic membranes

yolk sac, chorion, amnion, allantois

Which species have a diffuse placenta?

pig and mare

Which species have a zonary placenta?

dogs and cats

Which species have a discoid placenta?

rodents and primates

Which species have a cotyledonary placenta?

ruminants

Which species have concave cotyledons?

sheep

Which species have convex cotyledons?

cows

Which species have epitheliochorial placentas?

sow and mare

Which species have syndesmochorial placentas?

ruminants

Which species have endotheliochorial placentas?

dogs and cats

Which species have hemochorial placentas?

primates and rodents