Health Sciences 3300A/B Lecture Notes - Lecture 16: Central Nervous System, Spinal Nerve, Cranial Nerves

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 3300A/B
• Professor: Zaikia

Document Summary

The nervous system: describe the functional and structural organization of the nervous system. Identify nervous tissue types, location and function: di erentiate between di erent types of neurons and glial cells, compare white and gray matter. The nervous system consists of two major divisions: central nervous system (cns, brain - central unit, spinal cord - core component, peripheral nervous system (pns, cranial nerves that emerge from the brain. 12 of them: spinal nerves that emerge from the spinal cord. Hierarchical organization divides everything into sensory and motor in this picture. Synapse: no physical continuity, synaptic cleft, pre-synaptic terminal, contain synaptic vesicles. Inhibition of signaling (regulatory: when its released it doesnt cause excessive excitation but calms you associated with drinking ex. you. 100 billion neutrons and more gill cells then that. These cells make up half of the volume of the cns, however, much smaller than neurons: much more numerous, six types of glial cells, cns, astrocytes, oligodendrocytes, microglia, pns.