Embryology Flashcards
What is embryology
the study of development from fertilization to birth
teratology
abnormal development
importance of embryology
understand gross anatomical fetatures
development of certain common congenital defects
hypertrophy
increase in size
hyperplasia
increase in number
atrophy
decrease in size and number
metaplasia
changes in cell morphology
Patterning
establishment of correct orientation or position of preprogrammed subgroups of cells to each other
precedes differentiation or morphogenis
morphogesis
any change in shape of cells and tissues
differentiation
process by which any undifferentiated cell becomes committed to a particular cell lineage
Apoptosis
regulated cell death
slow turnover of cell remnants
NO INFLAMMATION
Necrosis
injury or external accident that was externally
irreversible cell injury
rapid death
inflammation
paracrine signaling
cell to cell signaling
Contact dependent signaling
must be in contact
Autocrine signaling
same cell types in the same tissue
Synaptic signaling
neurotransmitters releasing to synaptic space
Endocrine signaling
common in hormones
Induction
fate of the group cells is determined by interactions with another group
Order of Induction
- instructive
- permissive
instructive
cell follows a different pathway
permissive
additional signal to continue on that path
What make up morula
blastomeres
trophoectoderm/ trophpblast
group of cells of the morula
inner cell mass
becomes the embryo
