biology of the mind pysc 2000

biology of the mind pysc 2000 - The Biology of Mind M odule...

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Module 4: Neural and Hormonal Systems PSYC 2000 The Biology of Mind
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Neural and Hormonal Systems Module 4
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3 Neural and Hormonal Systems Neural Communication Neurons How Neurons Communicate How Neurotransmitters Influence Us The Nervous System The Peripheral Nervous System The Central Nervous System The Endocrine System
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Neural and Hormonal Systems Will Explain Why We FEEL…… Pain Strong Sick Nervous
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5 Neural Communication The body’s information system is built from billions of  interconnected cells called  nuerons .
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6 Neuron  A nerve cell or a neuron consists of many different  parts.
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7 Action Potential A brief wave of electrical  charge that travels down an  axon generated by the  movement of positively  charged atom in and out of  channels in the axon’s  membrane. 
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8 Action Potential Properties The action potential abides by an  all or none  principle :  When depolarizing current exceeds  threshold a neuron will fire, and below threshold it  will not. The intensity  of an action potential remains the  same ,  throughout the length of the axon.
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Example : 9 Action potential Refractory period All or none push needed
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10 Synapse  Synapse a   junction between the axon tip of the  sending neuron and the dendrite or cell body of the  receiving nueron. This tiny gap is called the  synaptic  gap  or  cleft.
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11 Neurotransmitters Neurotransmitters  (chemicals) released from  the sending neuron, travel  across the synapse and  bind to receptor sites on  the receiving neuron,  thereby influencing it to  generate an action  potential. 
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Neurotransmitter: Acetylcholine Its function is motor movement, learning, and   memory. To much and you will…. Not enough and you will…. Lack of ACH has been linked to Alzheimer's disease.
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Dopamine Its function is motor movement and alertness. Lack of dopamine is associated with Parkinson’s disease. Overabundance is associated with schizophrenia.
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Serotonin Function deals with mood control, hunger, sleep,  and arousal. Lack of serotonin has been  linked to depression.
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15 Neurotransmitters bind to the receptors of the  receiving neuron in a key-lock mechanism.
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16 Agonists
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17 Antagonists
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18 Nervous System Central Nervous System (CNS) Peripheral Nervous System (PNS)
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biology of the mind pysc 2000 - The Biology of Mind M odule...

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