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| 5199132303 | Ganglia | Clusters of neurons(primitive brains) | 0 | |
| 5199138496 | Sensory neurons | Sensors detect external stimuli and internal conditions and transmit information along these | 1 | |
| 5199150086 | Interneurons | Neurons that integrate the sensory information sent into the brain or ganglia | 2 | |
| 5199157933 | Motor neurons | Neurons that trigger muscle or gland activity | 3 | |
| 5199174044 | Central Nervous System (CNS) | Where integration takes place; this includes the brain and a nerve cord | 4 | |
| 5199184145 | Peripheral Nervous System (PNS) | Brings information into and out of the CNS | 5 | |
| 5199189842 | Cell body | Most of a neuron's organelles are here | 6 | |
| 5199193214 | Dendrites | Highly branched extensions that receive signals from other neurons | 7 | |
| 5199200320 | Axon | A much longer extension that transmits signals to other cells at synapses | 8 | |
| 5199207923 | Axon hillock | Where the axon attaches to the cell body | 9 | |
| 5199212557 | Synapse | A junction between an axon and another cell | 10 | |
| 5199216764 | Synaptic terminal | One axon passes information across the synapse in the form of chemical messengers | 11 | |
| 5199226357 | Neurotransmitters | Chemical messengers | 12 | |
| 5199231364 | Presynaptic cell | A neuron | 13 | |
| 5199234244 | Postsynaptic cell | A neuron, muscle, or gland | 14 | |
| 5199236739 | Glia | Most neurons are nourished or insulated by this | 15 | |
| 5199244406 | Membrane potential | A voltage (difference in electrical charge) across the plasma membrane | 16 | |
| 5199251604 | Resting potential | The membrane potential of a neuron not sending signals | 17 | |
| 5199256089 | Ion channels | The openings in the plasma membrane that convert chemical potential to electrical potential | 18 | |
| 5199293866 | Equilibrium potential E(ion) | The membrane voltage for a particular ion at equilibrium and can be calculated using the Nernst equation | 19 | |
| 5199318996 | Nernst equation | E(ion)=62mV*(log[ion](outside)/[ion](inside)) | 20 | |
| 5199336125 | Gated ion channels | Open and close in response to stimuli | 21 | |
| 5199339400 | Hyperpolarization | An increase in the magnitude of the membrane potential | 22 | |
| 5199345619 | Graded potentials | Changes in polarization where the magnitude of the change varies with the strength of the stimulus. | 23 | |
| 5199355627 | Voltage-gated | Na and K channels that respond to a change in membrane potential | 24 | |
| 5199361218 | Action potential | A strong stimuli results in a massive change in membrane voltage | 25 | |
| 5199366294 | Refractory period | After an action potential, a second action cannot be initiated during this period | 26 | |
| 5199374147 | 120m/s | The speed of an | 27 | |
| 5199392903 | Myelin sheaths | Insulates axons and causes an action potential's speed to increase | 28 | |
| 5199412749 | Oliodendrocytes and Schwann cells | The 2 types of glia cells that make myelin sheaths | 29 | |
| 5199418112 | Nodes of Ranvier | Action potentials are formed only in gaps in the myelin sheath where voltage-gated Na+ channels are found | 30 | |
| 5200398373 | Saltatory conduction | Action potentials in myelinated axons jump between the nodes of Ranvier | 31 | |
| 5200415266 | Synaptic vessicles | Where the preneuron synthesizes and packages the neurotransmitter | 32 | |
| 5200426024 | Synaptic cleft | The gap of a synapse where neurotransmitters diffuse and are received by the postsynaptic cell | 33 | |
| 5200446728 | Excitatory postsynaptic potentials (EPSPs) | Are depolarizations that bring the membrane potential toward threshold | 34 | |
| 5200456753 | Inhbitory postsynaptic potentials (IPSPs) | Are hyperpolarizations that move the membrane potential farther from threshold | 35 | |
| 5200468359 | Temporal summation | When 2 EPSPs are produced in rapid succession | 36 | |
| 5200483245 | Spatial summation | EPSPs produced nearly simultaneously by different synapses on the same postsynaptic neuron add together | 37 | |
| 5200501398 | Acetylcholine | A common neurotransmitter in vertebrates and invertebrates | 38 |
