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Ch #2 Behavioral_Neuroscience

Ch #2 Behavioral_Neuroscience - Behavioral Neuroscience TWO...

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Unformatted text preview: Behavioral Neuroscience TWO MAJOR SYSTEMS (that affect behavior & mental processes) • NERVOUS SYSTEM • ENDOCRINE SYSTEM • NERVOUS SYSTEM - Composed of brain, spinal cord, & a system of nerves • ENDOCRINE SYSTEM - Composed of glands that secrete hormones NEURON • Individual nerve cell • 100 billion neurons (90% in brain) Q: Is a nerve the same thing as a neuron? COMPONENTS • Axon - “acts on” the next neuron • Dendrites - receive info • Terminal buttons or knobs • Vesicles- sacs in terminal knobs containing neurotransmitters • Myelin sheath - increases efficiency • Cell body/soma, nucleus COMPONENTS • Synapse - gap b/n neurons • Neurotransmitters - chemical messengers from neurons • Receptor sites - lock and key mechanism NEURONAL TRANSMISSION NEURONAL TRANSMISSION NERVOUS SYSTEM CELLS • SENSORY NEURONS-Carry info to brain & spinal cord • MOTOR NEURONS-Carry info away from brain & spinal cord • INTERNEURONS-Carry info b/n neurons • GLIAL CELLS-Remaining cells in nervous system that create a “glue” or supportive system; aid in # of synaptic connections COMMON NEUROTRANSMITTERS • ACH (acetylcholine) - Excitatory • Dopamine (Inhibitory) • Serotonin (Inhibitory) • Norepinephrine (usu. Excitatory) • Endorphins (Inhibitory) Neural Communication Neurotransmitter molecule...
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Ch #2 Behavioral_Neuroscience - Behavioral Neuroscience TWO...

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