Brain’s Building Blocks
has initial symptoms of
repeating things, getting
lost, and mild
Over a period of 5-10 years, symptoms worsen and result in
profound memory loss,
lack of recognition of family & friends,
has no cure and is
The disease starts in some people at
Overview: Human Brain
1,350 g. (
primary fuel is
)iii There are about
1 trillion brain cells.
Gilial cells (
guide the development of neurons.
Support mature neurons.
()c Wrap themselves around neurons to form
electrical interference from other cells.
Release chemicals that influence a
neuron’s growth and
brain cell w/ 2 specific extensions.
electrical signals and the other, longer one sends electrical signals.
)iv There is almost
no evidence of
brain cell regeneration.
how complex mental activities (feeling, thinking,
learning, dreaming, etc.) can be
generated by the
brain’s physical membranes,
fluids, and chemicals.
Cell body (soma)
egg-shaped structure that
manufactures chemicals, and maintains the entire neuron in working order.
branchlike extensions that arise from cell body; they
signals from other neurons, muscles, or sense organs and pass them to cell
threadlike structure that extends from, and
away from, cell body to neighboring neurons, muscles, or organs.
tube like structure of fatty material that
diminishes interference from electrical signals generated by adjacent axons.
Has white hue.