ECON 2000 Chapter : Chapter 5
Document Summary
The nervous system the body"s electrochemical communication circuitry: neuroscience the field that studies the nervous system, neuroscientists the people who study neuroscience. Glial cells provide support, nutritional benefits, and other functions and keep neurons running smoothly. Symptoms include tingling sensations throughout the body and general weakness. Neural impulses: the axon in a tube encased in a semipermeable membrane, floating in this fluid are electrically charged particles called ions, sodium and potassium usually carry a positive charge, chlorine carries a negative charge. Drugs and neurotransmitters: drugs can mimic or increase the effects of a neurotransmitter or they can block those effects, agonist a drug that mimics or increases a neurotransmitters effect, antagonist drug that blocks a neurotransmitters effect. Immediately following this burst of action potentials, activity in the targeted brain area is inhibited, causing a virtual lesion: completely painless, when used with brain-imaging, allows scientists to examine the role of various brain regions, causal study.
