Online-histolec-finals (1).docx

Online-histolec-finals (1).docx - 1 The nervous system has...

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1. The nervous system has two principal divisions, the and the . CENTRAL NERVOUS SYSTEM & PERIPHERAL NERVOUS SYSTEM 2. Nerve cells that conduct impulses from the central nervous system to muscles and glands are neurons. MOTOR OR EFFERENT 3. Side branches of axons are called . AXON COLLATERAL 4. Sacs that store chemicals in the axon terminals area: . SYNAPTIC VESICLES 5. A covering around axons, which is produced by neuroglia, is called . MYELIN SHEATH 6. The network of neurons in the walls of the organs of the gastrointestinal tract regulating the digestive system is the . ENTERIC PLEXUS 7. The gaps in the myelin sheath along axons are called . NEUROFIBRAL NODES (NODES OF RANVIER) 8. The different charge on the inside and outside of a resting neuron is called . RESTING MEMBRANE POTENTIAL 9. The critical level of depolarization that has to be reached for an action potential to occur is the . THRESHOLD 10. When the polarity of a membrane becomes more negative than the resting membrane potential, the membrane is considered to be .
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