HN220 Lecture Notes - Lecture 6: Central Nervous System, Peripheral Nervous System, Homeostasis
Document Summary
Hn220 lecture 6 nerve cells & electrical signaling. Organs & divisions of the nervous system: anatomical divisions of the nervous system, central nervous system (cns); integrating centre, consists of the spinal cord and brain, peripheral nervous system (pns) Includes all neural tissue outside the cns: afferent (sensory) neurons, efferent neurons (take effect , neurons are cells that send and receive electrical signals rapidly and over long distances if needed, glial cells support. The nervous system: brain and spinal cord. Integrating centres for homeostasis, movement, and other functions: control the nervous system (all neural tissue in body, network of trillions of nerve cells (highly organized) Cells of the nervous system: neurons, excitable cells, glial cells, support cells. Cell body (soma: resembles a typical cell, contains, nucleus, other organelles to direct cellular activity, position varies in different types of, essential to the well-being of the neuron. Dendrites: thin, branched processes, receive incoming information, allow communication with multiple other neurons, dendritic spines:
