Psychology Exam Number 3 WS

Psychology Exam Number 3 WS - Psychology T.T.K. Quiz 3...

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Psychology T.T.K. Quiz 3 Chapter 3 – Neuropsychology Neurons – individual cells in the nervous system that receive, integrate, and transmit info Soma – the cell body, contains the nucleus Dendrites – the parts of a neuron that are specialized to receive information Axon – a long thin fiber that transmits signals away from the soma to other neurons, muscles, or glands Terminal Buttons – small knobs at the end of the axon that secrete neurotransmitters Synapse – a junction where information is transmitted from one neuron to another Neurotransmitters – chemicals that transmit information from one neuron to another Acetycholine – the only NT between motor neurons and voluntary muscle movement, regulates attention, arousal, and memory Dopamine – pleasurable emotions, coke elevates activity at dopamine synapses, overactivity associated with schizophrenia, degeneration of these neurons causes Parkinson’s Norepinephrine – contributes to mood and arousal, coke elevates activity at these synapses too Endorphins – resemble opiate drugs in structure and effects, pain relievers and pleasure Serotonin – regulates sleep, eating, aggression, abnormal levels contribute to depression and OCD, antidepressants affect serotonin circuits
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Agonist – a chemical that mimics the action of a neurotransmitter Antagonist – a chemical that opposes the action of a neurotransmitter Synaptic Transmission 1. Synthesis and Storage of Neurotransmitters 2. Release of Neurotransmitters 3. Binding of NTs at receptor sites 4. Inactivation by enzymes or removal by drifting away 5. Reuptake back into presynaptic neuron Resting Potential – the stable, negative charge when the neuron is inactive Action potential – a very brief shift in a neuron’s electrical charge that travels along the axon All-or-none law- the neuron will only fire when enough stimuli is present, weaker stimuli does not create weaker reactions Peripheral Nervous System – all the nerves that lie outside the brain and spinal cord Somatic Nervous System – nerves that connect to the voluntary skeletal muscles and sensory receptors Afferent – carry info in Efferent – carry info out Autonomic Nervous System– nerves that connect to the heart, blood vessels, smooth muscles, and glands Sympathetic – Mobilize, Action Parasympathetic – Conserve, Rest Central Nervous System – this consists of the brain and the spinal cord Hindbrain – the part of the brain that includes the cerebellum, the medulla, and the pons
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Medulla – in charge of unconscious functions such as breathing and circulation Cerebellum – a structure that coordinates fine muscle movement and balance Midbrain – the segment of the brainstem that lies between the midbrain and the forebrain…the midbrain is in charge of integrating sensory
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This note was uploaded on 03/30/2008 for the course PSYC 101 taught by Professor Loeb during the Fall '08 term at UNC.

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Psychology Exam Number 3 WS - Psychology T.T.K. Quiz 3...

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