Unit 3A Information
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| What is Biological Psychology? | A branch of psychology interested in the links of behavior and biology
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| What is a Neuron? | A nerve cell; the basic building block of the nervous system
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| What is a sensory neuron? | A neuron that carries incoming information from the sensory receptors to the brain and spinal cord.
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| What is a motor neuron? | A neuron that carries outgoing information from the brain and spinal cord to the muscles and glands
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| What are interneurons? | Neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor inputs.
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| What is a dendrite? | The bushy, branching, extensions of a neuron that receive messages and conduct impulses toward the cell body.
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| What is the axon? | The extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscles and glands.
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| What is the Myelin Sheath? | A layer of fatty tissue that insulates the neurons' axons and helps speed their impulses.
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| What is Action Potential? | A neural impulse: a brief electrical charge that travels down an axon.
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| What is a threshold? | The level of stimulation needed to trigger a neural impulse.
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| What is Phrenology? | The popular but ill-fated theory that claimed bumps on the skull could reveal our mental abilities and our character traits.
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| What is a synapse? | The junction between the axon tip of the sending neuron and the dendrite/cell body of the receiving neuron.
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| What are neurotransmitters? | Chemical messengers that cross the synaptic gaps between neurons.
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| What is a reuptake? | A neurotransmitter's reabsorption by the sending neuron.
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