Brain Development Flashcards
The cells of the nervous system connect with one another in trillions of remarkably specific patterns that form and ) ove rth ecourse of an organisms life
These connections develop among various types of neurons process that begins where
in the embryo
What is the first step
appropriate type sof neurons must arise in appropriate numbers and migrate to appropriate places
The axons and dendrites that form the connection then extend from _____ cells
nerve
What must happen to the growth of the axons
Must be guided over long distanes so that htey reach the appropriate targets. T
What happens to the connections that form initially then _ with the activity and experience of early posternal life
mature
The degree of complexity in the ______ and therefore the amount of interaction required to regulate its development
What is the brain to other organs in the body
much more complex
Are the initial steps in brain development similar accross the brain?>
They are similar, but later become different
What is an example of the brain development?
Diseases that are thought to be in the brain
Advances in teh study of bran development hve become increasingly relevent for what?
medical treatments
Three to four weeks after conception, one of the two cell layers of the empryo starts to do what?
Thicken up and build up along the middle,
As the cells continue to divide and this flat neural plate grows, parallel rides similar to the creases in a paper airplane rise across its
surface
When the top of the tube thickens …to makes haat?
three bulges that form the hind, mid and forebain
The emryo has three layers that undergo many interactions in order to grow in to what?
organ, bone, buscle, skin or neural tissue.
What do skin and neural tissue arise form
the ectoderm in response to signals provided ny the adjacent layer
A number of molecules interact to determine whether the ectoderm becomes what?
neural tissue or develops in another way to beomc skin
Studies of spinal cord development in forgs show that one major mechanism depends on specific proteins that inhibit
the activity of other proteins
IN an area where no inhibition occurs, what happens to the tissue?
It becomes skin
IN areas where proteins secreted form the esodern do lead inhibition, what happens to the tissue
It becomes neural
What does inhibit mean
to block a psycological process
Once the ectodermal tisssue has aquared its neural fate more signaling interactions determing what happen?>
What type of brain cell forms. The mature nervous system contains a vast array of cell types which can be divided into two main categories
What can the neurons in the nervous system be divided into?
They can be divided into two main categories: neurons responsible for signaling and for uspporting cells called glial cells
Researchers are finding that hte destiny of neural tissue depends on what
cell position withi the nervous system that define the environmental signals to which the cels are exposed.
