PSYCH Chapter 2

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  1. Why are the psychologists concerned with the brain?
    Your every idea, mood, urge is a biological happening.

    Although it is convenient to talk separately of biological and psychological influences on behavior, we need to remember: To think, feel, or act without a body would be like running without legs.

    Biological Psychologists--study the links between our biology and behavior
  2. What is a Brain?

    • An organ specialized to help individual organisms carry out acts of living
    •     --Made up of neurons (nerve cells) and 
    •     --Neuroglia or glia (cells between nerve cells)
    •     --It is part of the Central Nervous System (CNS)
    •     --Connects with the Peripheral Nervous System (PNS)
  3. Parts of the Neuron
    • Neuron-- a nerve cell; the basic building block of the nervous system
    • Cell Body (or soma)
    • Dendrites receive information and conduct it toward the cell body (listen)
    • Axon sends info from cell body to other neurons, muscles, or glands (speaks)
    •     Myelin Sheath-- covers axon of some neurons, providing insulation and improving efficiency of signal transmission
    •     Terminal Branches-- branching tips of axon, form synaptic connections with other cells 
  4. How does this signal Works
    Action Potential-- a brief electrical charge that travles down its axon, stimulating release of neurotransmitters from vesicles in the terminal buttons

    •     Depending on the type of fiber, a neural impulse travels at speeds ranging from 2 mph to 180 mph.
    •        Your reaction to a child darting in front of         your car may take a quarter-second or           more
    •     Neurotransmitters cross the synapse and bind to receptors sites on the dendrites of next neuron
  5. Neurotransmitter Action
    When neurotransmitters bind, they open ion channels which allow ion to cross the membrane, creating a new action potential
Card Set:
PSYCH Chapter 2
2015-04-24 17:49:39
Biology Behavior
Science of Mind
Flash Cards for Chapter 2
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