The Nervous System Unit II: Biology and Behavior -What is it? -How does it affect our behavior?

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<ul><li><p>The Nervous SystemUnit II: Biology and Behavior</p><p>-What is it?-How does it affect our behavior?</p></li><li><p>VocabBiology-Study or science of life in all its forms, esp. the origin, growth, reproduction, structure, and behavior.Peripheral-the external boundary of any surface or area.Involuntary-not voluntary; independent of one's will; not by ones own choice.</p></li><li><p>VocabNeuron-a specialized, impulse-conducting cell that is the basic unit of the nervous system. (A nerve cell)Hormone-various internally secreted compounds formed in the endocrine glands that affect the functions of the body.Heredity-the transmission of genetic characteristics from parents to offspring.</p></li><li><p>The Nervous SystemWill Explain Why We FEELPainStrongNervous</p></li><li><p>The Nervous System is A big communication system between the brain and the body.</p><p>Helps us to gain information that is going on inside and around our bodyrespond accordingly</p></li><li><p>The Nervous System is Made up of nerves bundles of long thin cells called neurons.</p><p>Nerves send messages between the brain and the body.</p></li><li><p>The Nervous System is Neurons fundamental unit of the nervous system nerve cell (5 parts)have the ability to communicate with one another</p></li><li><p>Neuron Structure</p></li><li><p>5 Major parts to a neuronDendritesCell BodyAxon- can be thousandths of an inch or up to three feet!Myelin Sheath- aids transmissionDegeneration can result in Multiple SclerosisAxon TerminalsSynaptic Gap- fluid filled and 5 millionth of an inch wide. Takes 10 millionth of a second to cross.</p></li><li><p>Synaptic GapFluid filled and 5 millionth of an inch wide10 millionth of a second to cross </p></li><li><p>The Nervous System is Two Parts1. Central Nervous System (CNS)brain and spinal cord encased in bone</p></li><li><p>The Nervous System is2. Peripheral Nervous System (PNS)Nerves cells/ Neurons Connects the CNS to the body Carries information to and from the brain &amp; spine.Outer Edge</p></li><li><p>2 Parts of the Peripheral Nervous SystemSomatic nervous systemControls voluntary muscles and transmits sensory information to the CNS</p><p>Autonomic nervous systemControls involuntary body functionsHeartbeat, Blood pressure, Breathing, DigestionHas two partsSympatheticParasympathetic</p></li><li><p>A blueprint of the Nervous System </p></li><li><p>How the Autonomic System affects our behaviorsSympathetic Nervous System Fight or Flight ResponsePrepares our body to confront the situation or RUN!Remember that sympathetic, stress, and sympathy begin with S.</p></li><li><p>How the Autonomic System affects our behaviorsParasympathetic Nervous System Restores the bodys energy reserves after an event has occurred.Remember that parasympathetic and peaceful both begin with P.SLUDD (salivation, lacrimation, urination, digestion and defecation).</p></li><li><p>How it affects our behaviorsSympathetic VS. Parasympathetic</p></li><li><p>How the Nervous Systems affects our behaviors Neurotransmitters chemicals released by neurons which help them pass messages to the next neuron.</p><p>Three important neurotransmitters (over 100 are known) have a big influence on our feelings and behavior.SerotoninDopamineEndorphins</p></li><li><p>SerotoninFunction deals with mood control and sleepProduced in the brain and intestinesMelatonin-Different hormone that helps those with insomniaAbnormal levels of serotonin have been linked to depression and obsessive-compulsive disorder (OCD).</p></li><li><p>DopamineDeals with motor movement and alertness.Produced in brainDeficiency of dopamine is associated with Parkinsons disease.Excess is associated with schizophrenia.Antipsychotic drugs block dopamine receptors.Cocaine, nicotine, &amp; amphetamines increase dopamine activity.</p></li><li><p>EndorphinsRegulates pain control/pain perception during stress or trauma.Can give a euphoric feelingWe can become addicted to endorphin causing feelings.Similar to opiate addiction (morphine, heroin, &amp; codeine).Acupuncture</p></li><li><p>Another important neurotransmitterAcetylcholine-uh-seet-ul-KO-leenMuscle controlLow amounts linked to Alzheimer'sNerve gas &amp; black widow venom cause too much acetylcholine to be released resulting in convulsions and suffocation.Nicotine mimics acetylcholine.</p><p>***************</p></li></ul>


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