ANSC 3040 Exam QUESTIONS WITH |\ |\ |\ |\ |\
ANSWERS
embryonic period of developmental biology - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔d0-42 in cattle |\ |\ |\
starts w/formation of zygote after fertilization
|\ |\ |\ |\ |\
|\ - morulation: morula formation by cleavage of zygote
|\ |\ |\ |\ |\ |\ |\
- blastulation: formation of blastocyst, ICM forms
|\ |\ |\ |\ |\ |\ |\ |\
embryonic disk, rest if trophectoderm, conceptus
|\ |\ |\ |\ |\ |\
elognates when trophectoderm proliferates
|\ |\ |\
|\ - gastrulation: formation of germ cell layers
|\ |\ |\ |\ |\ |\
ends w/formation of basic structure of organs
|\ |\ |\ |\ |\ |\
fetal period of developmental biology - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔d43-278 (birth) in cows |\ |\ |\ |\
growth, maturation, remodeling, of organ systems
|\ |\ |\ |\ |\
do we see elongation in the equine conceptus? -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔no |\ |\
what does endoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔digestive system |\
lungs
,endocrine system |\
what does mesoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔muscle
skeleton
cardiovascular
repro system |\
urinary system |\
what does ectoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔nervous system |\
skin
hair
external parts of RT |\ |\ |\
what causes variability in body weight at birth? -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔genetics of dam (contributes to
|\ |\ |\ |\ |\ |\ |\
embryo genetics and uterine physiology) and embryo
|\ |\ |\ |\ |\ |\ |\
(influenced by genetics of mother and father) ex.Brahman
|\ |\ |\ |\ |\ |\ |\
in Charolais increases fetus BW
|\ |\ |\ |\ |\
type of embryo (IVF, cloning)
|\ |\ |\ |\
nutrition and health of dam |\ |\ |\ |\
maternal maturity |\
infectious diseases |\
,environmental temperature |\
gestation length |\
twins/litter size (compete for nutrients and space) |\ |\ |\ |\ |\ |\
consequences of variability in body weight at birth - |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔dystocia (too big) |\ |\ |\ |\
health ex. babies that grow very quickly post-natally are
|\ |\ |\ |\ |\ |\ |\ |\ |\
more likely to have cardiovascular problems in life
|\ |\ |\ |\ |\ |\ |\
performance ex. if too small could have trouble surviving |\ |\ |\ |\ |\ |\ |\ |\ |\
post-partum
carcass traits |\
functions of placenta - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔fetal/maternal exchange of nutrients, gases, and |\ |\ |\ |\ |\ |\
waste ex. glucose (main carb for fetus), acetate (for lipid
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
synthesis)
endocrine organ - produces P4, E2, placental lactogen,
|\ |\ |\ |\ |\ |\ |\ |\
glycoproteins, eCG, hCG |\ |\
physical protection - shock, trauma, disturbance
|\ |\ |\ |\ |\
biological protection - maternal immune system (paternal
|\ |\ |\ |\ |\ |\ |\
DNA may cause immune reaction bc recognized as non-
|\ |\ |\ |\ |\ |\ |\ |\
self cell), toxins
|\ |\
, components of placenta - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔embryonic/fetal - extraembryonic membranes, starts |\ |\ |\ |\ |\
to form before implantation in domestic species
|\ |\ |\ |\ |\ |\
maternal - endometrium, forms by differentiation of
|\ |\ |\ |\ |\ |\ |\
endometrial cells during implantation |\ |\ |\
nutrition of conceptus - CORRECT ANSWERS ✔✔pre and
|\ |\ |\ |\ |\ |\ |\ |\
peri-implantation: histotroph, becomes a limitation w/the |\ |\ |\ |\ |\ |\
development of the conceptus bc no direct contact |\ |\ |\ |\ |\ |\ |\
post-implantation w/functional placenta: haemotroph, |\ |\ |\ |\
allows exchange of nutrients, hormones, gases, and
|\ |\ |\ |\ |\ |\ |\
waste b/w fetal and maternal blood circulation
|\ |\ |\ |\ |\ |\
hemochorial placenta - CORRECT ANSWERS ✔✔primates, |\ |\ |\ |\ |\ |\
rodents
no layers on maternal side
|\ |\ |\ |\
3 layers
|\
chorionic villi adhere to endometrium in disc, highly
|\ |\ |\ |\ |\ |\ |\ |\
invasive trophoblast break down endothelium of maternal
|\ |\ |\ |\ |\ |\
vessels and maternal blood supply so surrounded by
|\ |\ |\ |\ |\ |\ |\ |\ |\
blood
endotheliochorial - CORRECT ANSWERS ✔✔degradation of |\ |\ |\ |\ |\
epithelium
|\
4-5 layers |\
ANSWERS
embryonic period of developmental biology - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔d0-42 in cattle |\ |\ |\
starts w/formation of zygote after fertilization
|\ |\ |\ |\ |\
|\ - morulation: morula formation by cleavage of zygote
|\ |\ |\ |\ |\ |\ |\
- blastulation: formation of blastocyst, ICM forms
|\ |\ |\ |\ |\ |\ |\ |\
embryonic disk, rest if trophectoderm, conceptus
|\ |\ |\ |\ |\ |\
elognates when trophectoderm proliferates
|\ |\ |\
|\ - gastrulation: formation of germ cell layers
|\ |\ |\ |\ |\ |\
ends w/formation of basic structure of organs
|\ |\ |\ |\ |\ |\
fetal period of developmental biology - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔d43-278 (birth) in cows |\ |\ |\ |\
growth, maturation, remodeling, of organ systems
|\ |\ |\ |\ |\
do we see elongation in the equine conceptus? -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔no |\ |\
what does endoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔digestive system |\
lungs
,endocrine system |\
what does mesoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔muscle
skeleton
cardiovascular
repro system |\
urinary system |\
what does ectoderm form into? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔nervous system |\
skin
hair
external parts of RT |\ |\ |\
what causes variability in body weight at birth? -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔genetics of dam (contributes to
|\ |\ |\ |\ |\ |\ |\
embryo genetics and uterine physiology) and embryo
|\ |\ |\ |\ |\ |\ |\
(influenced by genetics of mother and father) ex.Brahman
|\ |\ |\ |\ |\ |\ |\
in Charolais increases fetus BW
|\ |\ |\ |\ |\
type of embryo (IVF, cloning)
|\ |\ |\ |\
nutrition and health of dam |\ |\ |\ |\
maternal maturity |\
infectious diseases |\
,environmental temperature |\
gestation length |\
twins/litter size (compete for nutrients and space) |\ |\ |\ |\ |\ |\
consequences of variability in body weight at birth - |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔dystocia (too big) |\ |\ |\ |\
health ex. babies that grow very quickly post-natally are
|\ |\ |\ |\ |\ |\ |\ |\ |\
more likely to have cardiovascular problems in life
|\ |\ |\ |\ |\ |\ |\
performance ex. if too small could have trouble surviving |\ |\ |\ |\ |\ |\ |\ |\ |\
post-partum
carcass traits |\
functions of placenta - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔fetal/maternal exchange of nutrients, gases, and |\ |\ |\ |\ |\ |\
waste ex. glucose (main carb for fetus), acetate (for lipid
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
synthesis)
endocrine organ - produces P4, E2, placental lactogen,
|\ |\ |\ |\ |\ |\ |\ |\
glycoproteins, eCG, hCG |\ |\
physical protection - shock, trauma, disturbance
|\ |\ |\ |\ |\
biological protection - maternal immune system (paternal
|\ |\ |\ |\ |\ |\ |\
DNA may cause immune reaction bc recognized as non-
|\ |\ |\ |\ |\ |\ |\ |\
self cell), toxins
|\ |\
, components of placenta - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔embryonic/fetal - extraembryonic membranes, starts |\ |\ |\ |\ |\
to form before implantation in domestic species
|\ |\ |\ |\ |\ |\
maternal - endometrium, forms by differentiation of
|\ |\ |\ |\ |\ |\ |\
endometrial cells during implantation |\ |\ |\
nutrition of conceptus - CORRECT ANSWERS ✔✔pre and
|\ |\ |\ |\ |\ |\ |\ |\
peri-implantation: histotroph, becomes a limitation w/the |\ |\ |\ |\ |\ |\
development of the conceptus bc no direct contact |\ |\ |\ |\ |\ |\ |\
post-implantation w/functional placenta: haemotroph, |\ |\ |\ |\
allows exchange of nutrients, hormones, gases, and
|\ |\ |\ |\ |\ |\ |\
waste b/w fetal and maternal blood circulation
|\ |\ |\ |\ |\ |\
hemochorial placenta - CORRECT ANSWERS ✔✔primates, |\ |\ |\ |\ |\ |\
rodents
no layers on maternal side
|\ |\ |\ |\
3 layers
|\
chorionic villi adhere to endometrium in disc, highly
|\ |\ |\ |\ |\ |\ |\ |\
invasive trophoblast break down endothelium of maternal
|\ |\ |\ |\ |\ |\
vessels and maternal blood supply so surrounded by
|\ |\ |\ |\ |\ |\ |\ |\ |\
blood
endotheliochorial - CORRECT ANSWERS ✔✔degradation of |\ |\ |\ |\ |\
epithelium
|\
4-5 layers |\
