Shared Flashcard Set

Details

Development and Inheritance
Baby Love
13
Anatomy
Undergraduate 1
04/27/2009

Additional Anatomy Flashcards

 


 

Cards

Term
Fertilization is...
Definition
the fusion of a secondary oocyte and a spermatozoon, which forms a zygote
Term
The fertilization process:
Definition

Step 1 - fertilization and oocyte activation

Step 2 - Pronucleus formation begins

Step 3 - Cytokinesis begins

Step 4 - Cleavage begins

Step 5 - Spindle formation and cleavage preparation

Term
What are the three stages of prenatal development?
Definition
first, second and third trimesters
Term
What are critical events of the first trimester?
Definition

Implantation - attachment of fertilized egg

Placentation (placenta - blood vessels)

Embryogenesis - formation of viable embryo

Term
What fluid surround and cushions the fetus?
Definition
amniotic fluid
Term
During the second and third trimesters what supports the developing fetus?
Definition
the maternal organ system
Term
Labor consists of what three stages?
Definition

dilation - cervix dilates

 

expulsion - delivery of baby (usually less than 2 hours)

 

placental - Uterine contractions expel the placenta

Term
What are the postnatal stages in a person's life?
Definition

neonatal period

infancy

childhood

adolescence

maturity

senescence - aging

Term
What determines the patterns of inheritance?
Definition
Genes and chromosomes
Term
What is a zygote?
Definition
The fertilized egg (ovum), prior to the start of cleavage
Term
Normal somatic cells contain how many chromosomes?
Definition
46
Term
What are the two types of sex chromosomes?
Definition

X and Y

 

Male = XY

 

Female = XX

Term
What is differentiation in embryonic development?
Definition

Selective activation: Some genes are turned on and some are turned off

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