Paring Back Flashcards
After growth, the neural network is pared back to create a more efficient system. Only about 1/2 the neurons generated during development survive to
funtion in the adult
Entire populations of neurons are removed through
apatosis (cell death)
When is Apoptoss activated?
If a neuron loses its battlewith other nerons to receive life sustaining chemialsignals calle dtrophic factors
ARe these these factors produced in mass quantities?
No, they are produced in limited quantities by target tissues
What does each type of trophic factor support?
The survival of a distinct group of neurons.
What do some diseases do?
They influec the cells own death programs
Brain cells also form to may connections at first
What communication is necessary?
Communication between enurons wiht chemical and electrical signals is necessary to weed out the conncetions
