Neurotransmitters Acetylcholine (ACh) Affects contraction in muscle Glutamate Excite neighboring neurons Norepinephrine & Serotonin Appetite, sleep, memory, temperature, mood, cardiov system, endocrine system Epinephrine Fight or flight Dopamine Mood, motivation, pleasure GABA Inhibitory Drugs & Neurotransmitters Cocaine Serotonin reuptake inhibitor Methamphetamine Causes release of serotonin, dopamine & epinephrine and inhibits reuptake Heroin Endorphin agonist Psychedelics Serotonin receptor agonist, glutamate MDMA Release of serotonin, dopamine, oxytocin Cannabis Cannabinoid agonist Long-distance transmission Myelin sheath Helps electrical signal transmission over longer distances Signals sent faster Less likely to lose propagation of action potential Multiple Sclerosis WBCs attack myelin Central Nervous System Brian Spinal chord Peripheral nervous system Everything else Peripheral NS Somatic Skin Tendons Muscles Autonomic Organs & glands Sympathetic Fight-or-flight Parasympathetic Housekeeping Peripheral NS Somatic Skin Tendons Muscles Autonomic Organs & glands Sympathetic Fight-or-flight Parasympathetic Housekeeping Spinal Chord Connects peripheral NS to the brain Reflexes Sensory neurons Motor neurons Vertebral column Meninges – protective coverings Meningitis The vertebrate brain Brain stem Pain, temp, itch Medulla oblongata Reflexes, respiration, circulation Cerebellum Motor coordination Thalamus Relay & sorting Hypothalamus Homeostatis – thirst, sex, hunger The Human Brain - Cerebrum Broca’s area – language Parietal lobe – spatial sense & navigation Frontal lobe – executive functions, reward, planning, drive The Human Brain - Cerebrum Temporal lobe – auditory perception, long-term memory Occipital lobe - visual Corpus callosum – the bridge
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