NROB60H3 Lecture 2: Chapter Two
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Neurons that sense changes in the environment, communicate these changes to the other neurons a(cid:374)d (cid:272)o(cid:373)(cid:373)a(cid:374)d the (cid:271)ody"s respo(cid:374)ses to these se(cid:374)satio(cid:374)s. Glia or glia cells; contribute to brain function mainly by insulating, supporting, and nourishing neighbouring neurons. Scientists fix tissues by immersing them in formaldehyde, and they developed a special device called microtome to make very thin slices. Histology the microscopic study of the structure of tissues. Franz nissl stain the nuclei of cells as well as clumps of material surrounding the nuclei of neurons nissl bodies in the nissl stain. Nissl stain distinguishes between neurons and glia and it enables histologists to study the arrangement or cytoarchitecture of neurons in different parts of the brain meaning the brain consists of many specialized regions. Soaking brain tissue in a silver chromate solution. Makes a small percentage of neurons become darkly coloured in their entirety revealing the neuronal cell body.
