chapter 5 biosocial development Flashcards
most notable time for physical changes
first 12 months
birthweight doubles by
4 months
how many hours do newborns sleep a day?
17 hours
%’s of adult brain size for infants during early brain development?
25% at birth
75% by age 2
long thin nerve cells that
make up nervous system
neurons
what percent of neurons are in the cortex?
70%
what nerve fibers send impulses?
axons
which nerve fibers receive impulses?
dendrites
nerve fibers that carry info from axon to dendrites?
neurotransmitters
the critical communication links with brain?
synapse
Period of exuberance?
first 2 years
1 neuron can connect to how many other neurons?
15,000
what time of memory is limitless and permanent?
long term memory
the effect of too much stress
overproductions of stress hormone, brain loses ability to react to stress normally
experience expectant
require common experiences to develop normally (language)