Shared Flashcard Set

Details

Bio 30: reproduction part 2
development, birth, tech, sti's, etc
25
Biology
12th Grade
03/18/2008

Additional Biology Flashcards

 


 

Cards

Term

Where does fertilization occur?

How? 

Definition

fallopian tube

sperm + egg nuclei meet 

Term

what is cleavage?

where does it occur? 

Definition

cleavage is early cell division

 

it occurs in the fallopian tubes 

Term
what is a blastocyst
Definition
specialized group of cells
Term

when does implantation occur?

what is it? 

Definition

around day 7

 

blastocyst barries into endometrium 

Term

what is the role of hCG?
where is it secreted from?

where does it act? 

Definition

hCG stimulates the corpus luteum to produce progesterone and estrogen.

 

it is secreted from the chorion (outer layer around embryo)

 

it acts on the corupus luteum 

Term
what is gastrulation
Definition
development of the 3 germ layers
Term
what is the ectoderm
Definition

outter layer

 

brain, skin, nervous system, hair, etc. 

Term
what is the endoderm
Definition

inner layer

 

digestive system, respiratory system, etc.

Term
what is the mesoderm
Definition

middle layer

 

muscles, blood vessels, bones, etc. 

Term
what is neurilation?
Definition
nervous system formation in ectoderm
Term
what forms from the allantois 
Definition
umbilical cord
Term
what is the role of the amnion
Definition
fluid: protection, temp. regulation, etc
Term
what is the role of the chorion
Definition

produces placenta

secretes hCG 

Term
what is the role of the yolk sac
Definition
makes red blood cells until liver formation
Term

what is the placenta?

what does it develop from?

 

Definition

a flat organ

high blood vessel concentration

used to transport nutrients, O2, teratogens

 

develops from chorion

 

flat = increased SA 

Term

what is the umbilical cord?

what does it develop from?

 

 

Definition

cord with high blood vessel concentration for transport

 

develops from allantois 

Term
what are the major events in the first trimester
Definition
organ development
Term
what are the major events in the second trimester
Definition
more organ development
Term
what are the major events in the third trimester
Definition
repiratory development, fat building, increase in size
Term
what is the role of oxytocin in parturition
Definition
increases uterin contractions
Term
what is the role of prostaglandina in parturition
Definition
increase uterin contractions
Term
what is the difference between prolactin and oxytocin in lactation
Definition

prolactin: produces milk

oxytocin: milk ejection 

Term
what is invitro fertlization
Definition

female is given superovulatory drugs

eggs are removed

sperm sample is taken

eggs + sperm mixed to fertilized

implantation 

Term
what is ICSI
Definition

intra cytoplasmic sperm injection

 

sperm screened

1 is chosen

injected into egg's cytoplasm 

Term
what is the early source of nutrients for the developing embryo
Definition
cytoplasm ofthe egg - until implantation
Supporting users have an ad free experience!