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33 Cards in this Set

  • Front
  • Back
a nerve cell , the basic building block of the nervous system
the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body (soma)
the cell body of a neuron, which contains the nucleus and other parts that keep the cell healthy
the extension of a neuron through which nwural impulses are sent
axon terminal
the endpoint of a neuron there neurotransmitters are stored
action potential
a neural impulse a brief electrical charge that travels down the axon of a neuron
refractory period
the recharging phase when a neuron after firing cannot generate another action potential
resting potential
the state of a neuron when it is at test and capable of generating an action potential
all or none principle
states that if a neuron fires, it always fires at the same intensity, all action potentials are the same strength
tiny, fluid filled gap between the axon terminals of one neuron and the dendrite of another
a chemical messenger that travels across the synapse from one neuron to the next,and influences whether a neuron will generate on action potential ( impulse)
excitatory effect
a neurotransmistter effect that makes it more likely that the receiving neuron will generate an action potential (impulse)
a neurotransmitter effect that makes it less likely that the receiving neuron will generate an action potential( impulse)
receptor cells
specialized cells in the sensory systems of the body that can turn other kinds of energy into action potentials (impulses) that the nervous system can process
sensory nerve
carry information from the sense receptors to the central nervous system
nerve cells in the brain and spinal cord responsible for processing information related to sensory input and motor output
motor nerves
carry information to the muscles and glands from the central nervous system
a neurotransmitter that triggers muscle contraction and affects learning and memory
a drug that blocks the effect of a neurotransmitter
a drug that boost the effects of a neurotransmitter
a neurotransmitter that affects learning , attention,and emotion, excess dopamine activity is associated will schizophrenia
a neurotransmitter that affects hunger, sleep, arousal and mood,seratonin appears in lower than normal levels in depressed people
central nervous system (cns)
the brain and spinal cord
peripheral nervous system (PNS)
sensory and motor nerves that connect the (cns )to the rest of the body
somatic nervous system
the division of the PNS that controls the body's skeletal muscles
division of the PNS that controls the glands and muscles of the internal organs.Its subdivisions are the sympathetic (arousing) and parasympathetic (calming)
sympathetic division
part of the autonomic nervous system that arouses the body to deal with perceived threats
parasympathetic division
part of the autonomonic nervous system that calms the body
endocrine system
one of the body's two communication systems a set of gland that produce hormones chemical messengers that circulate in the bloos
chemical messengers produced by the endocrine glands and cirulated in the blood
pituitary glands
the endocrine sytems "master gland" that in conjuction with the brain controls the other endocrine glands
thyroid gland
endocrine gland that helps regulate the energy level in the body
adrenal glands
endocrine glands that help to arouse the body in times of stress