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| The 2 principal divisions of the nervous system are the Central NS and the _NS |
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| the period of time in which an excitable cell cannot generate another action potential is called the _________ period. |
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| The central nervous system contains the _____ and the ____. |
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| ______ neurons carry nerve impulses from receptors to the CNS |
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| The peripheral nervous system is subdivided into somatic nervous system and the ____ nervous system. |
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| neuroglia that produce the myelin sheath in the central nervous system are the ______. |
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| the nucleus of a neuron is located in the ________ of the neuron. |
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| nerve impulses are conducted toward the cell body by a neuronal process called a(n)____. |
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| nerve impulses arise in an area at the junction of the axon hillock and the initial segment called the _________. |
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| synaptic vesicles store _______. |
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| the general term for any neuronal process is a nerve ____. |
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| a neuron with several dendrites and one axon is classified as a(n) ____ neuron. |
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| the effectors for general somatic efferent neurons are ________. |
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| nerve cell bodies in the PNS generally are clustered together to form _________. |
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| an ion channel the opens in response to direct changes in the membrane potential is called a(n) _______ channel. |
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| a cell that exhibits a membrane potential is said to be _______. |
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| a membrane whose polarization is more negative than the resting level is said to be ________. |
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| rapid opening of voltage-gated sodium ion channels is called _____. |
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| recovery of the resting potential due to opening of voltage-gated potassium ion channels and closing of voltage-gated sodium ion channels is called ______. |
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| impulse conduction that appears to jump from one neurofibral node to the next is called _____ conduction. |
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| the largest, fastest conduction, myelinated nerve fibers are called type ____ fibers. |
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| when a nerve impulse arrives at a synaptic end bulb or varicosity, the depolarization phase opens voltage-gated ______ channels in addition to opening voltage gated sodium ion channels |
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| a neurotransmitter that causes hyperpolarization of the membrane is said to cause a(n)______ postsynaptic potential. |
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| integration of the effects of the neurotransmitters from several presynaptic neurons by a postsynaptic neuron is referred to as ____________. |
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