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26 Cards in this Set
- Front
- Back
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Acetylcholine (ACh)
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Enables muscle action,learning and memory
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Dopamine
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Influences movement, learning, attention, and emotion
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Serotonin
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Affects mood, hunger, sleep and arousal
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Norepinephrine
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Helps control alertness and arousal
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GABA (gamma-amino-butyric acid)
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Major inhibitory transmitter
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Glutamate
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Major excitatory neurotransmitter; involved in memory
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Neuron
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a nerve cell, basic building block of the nervous system
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dendrite
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bushy, branching extension of a neuron that receives messages and conducts impulses
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axon
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extension of neuron through which messages pass to other neurons or muscles or glands
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action potential
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a neural impulse, brief electrical charge that travels down an axon
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threshold
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level of stimulation required to trigger a neural impulse
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synapse
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junction between and axon and dendrite
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neurotransmitters
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chemical messengers that traverse the synaptic gap
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nervous system
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body's electrochemical communication network
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central nervous system (CNS)
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the brain and spinal cord
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peripheral nervous system (PNS)
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the sensory and motor neurons that connect the CNS to the rest of the body
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sensory neurons
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neurons carrying incoming info form sense receptors to the CNS
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motor neurons
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neurons carrying outgoing info from CNS to muscles and glands
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interneurons
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CNS neurons that internally communicate and intervene between sensory inputs and motor outputs
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somatic nervouse system
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the peripheral nervous system that controls the skeletal muscles
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autonomic nervous system
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the peripheral nervous system that controls the glands and the muscles of the internal organs. (sympathetic arouses, parasympathetic calms)
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sympathetic nervous system (fight or flight)
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arouses and expends energy
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parasympathetic nervous system (feed or breed)
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conserves energy, calms the body
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reflex
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a autonomic response to a sensory stimulus
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endocrine system
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the body's chemical communication system, glands that secrete hormones into the bloodstream
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hormones
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chemical messengers produced in one tissue and affect another
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