•receive information; input
• integrate information with past experiences; processing • Guide actions; output.
Brain can adjust the impact of incoming information (can’t tickle oneself) Brain cells communicate by chemicals signals released by other cells. Made of separate cells
Neurons: cells that are specialized to quickly respond to signals and to quickly send signals of their own •have outer membrane
• cell body -> contains nucleus
•mitochondria -> turn oxygen and glucose into energy
Glial cells: help neurons communicate by directing their growth, stable chemical environment providing energy, help restore damage + hold neurons together. •Synthesize similar proteins as bacteria
Neuron communicate efficiently because ->
•structure –long thin fibers that extend outer ward of cell body; intermixing allows neurons to be close to many other neurons. 2 types of fibers –
Axons: fibers that carry signals away from the cell body, out to where communicate occur with other neurons. Dendrites: fibers that receive signals from the axons of other neurons and carry them down the cell body. Synapse: gap between neurons where they communicate
•Nerve cell membrane is semipermeable (allows some things to pass) •Inside of membrane is normally slightly negative as positive charged molecules are often pumped out through the membrane [Polarized state of cell membrane] Negative-positive attraction leads to electrochemical potential which drives...