fertilisation to trilaminar

Question 1

what does the sperm bind with

Answer 1

zona pellucida glycoprotein - zp3

Question 1

what happens when sperm binds

Answer 1

acrosomal enzymes are released from sperm head and sperm digests its way in

Question 2

what happens once sperm is in egg

Answer 2

egg and sperm plasma membrane fuse and sperm contents enter the egg

Question 3

what does sperm entry tirgger

Answer 3

completion of meiosis 2

Question 4

where does fertilisation occur

Answer 4

ampulla of uterine tube

Question 5

totipotent

Answer 5

up to 8 cell stage

Question 6

what does the zygote subdivide into

Answer 6

blastomeres

Question 7

mosaicism

Answer 7

individuals with two or more cell line with idfferent chromosome complemetns

Question 8

morula

Answer 8

16+ blastomeres

Question 9

where does implantation occur

Answer 9

posterior or anterior uterine wallwh

Question 10

what day does implantation occur

Answer 10

day 6

Question 11

day 7.5

Answer 11

bilaminar embryo
trophoblast divides

Question 12

what does the trophoblast divide into

Answer 12

cytotrophoblast and synctiotrophoblast

Question 13

what does the embryo organise into

Answer 13

epiblast and hypoblast

Question 14

day 9

Answer 14

formation of amniotic cavity and primitive yolk salc

Question 15

primitive yolk sac

Answer 15

hypoblast

Question 16

amniotic cavity

Answer 16

epiblast

Question 17

what day is implantation complete

Answer 17

day 9

Question 18

gastrulation

Answer 18

formation of 3 primary germ layers

Question 19

gastrulation

Answer 19

cells migrate through the primitive streak between the epiblast and definitve endoderm
embryo transforms from a one-dimensional layer of epithelial cells, a blastula, and reorganizes into a multilayered and multidimensional structure called the gastrula

Question 20

what is derived from ectoderm

Answer 20

epidemris of skin
nervous system

Question 21

mesoderm

Answer 21

divided into 3 regions
axial skeleton, skeletal muscle and parts of back

Question 22

intermediate mesoderm

Answer 22

urogenital systems

Question 23

lateral plate mesoderm; somatic

Answer 23

most of dermis
, linig of body wall
parts of limbs

Question 24

lateral plate mesoderm; visceral

Answer 24

cdv system, mesothelial covering of organs, smooth muscle

Question 25

fate of endoderm

Answer 25

Lining of the gut tube
Lining of respiratory tract
Lining of the bladder and urethra