Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/7

Click to flip

7 Cards in this Set

  • Front
  • Back
WHy is the conceptus not immunologically rejected by the mother during the process of of implantation?
THe decidual reaction downregulates immune cells.
What are homeobox genes? What is their role in development? How are they regulated?
Homeobox genes encode transcription factors that are involved in axis formation and the regulation of development. They are regulated by signal molecules.
Place these in order of earliest sensitive period.

Eyes
Palate
CNS
Teeth
Heart
External genitalia
Lower limb
Ears
Upper lip
Upper limb
CNS
Heart
Upper limb
Lower limb
Ears
Eyes
Upper lip
Teeth
Palate
External genitalia
What is induction? Give two examples of this.
Induction is one tissue controlling formation of another structure.
Notochord controls formation of spinal chord
The oral pharyngeal controls the formation of the brain region
Describe the following processes that are important in development:
Tissue aggregation
Cell death
Differentiation
Growth and regeneration
Tissue aggregation - Cells proliferate/move together to make critical cellular mass
Cell death - apoptosis seperation of fingers
differentiation - more differentiated less able to reproduce
groth and regeneration - proliferation cintinually losing cell populations
Give an example of a defect caused be each of these environmental teratogens.
1) Infectious agents
2) Radiation or chemical
3) Hormonal
Viruses, measles -effect eye/ear development
Radiation/chemical - affect sites of rapid proliferation hormone, nervous, reproductive systems)
Hormonal - hormonal/reproductive sstems influenced
Give an example of a defect caused by autosomal abnormalities.

Give an example of a defect caues by sex chromosome abnomalities.
Autosomal - Down's syndrome, Patau syndrome

Sex chromosome abonormalities - Turner, Kleinfelters