BIO 2870 Lecture Notes - Lecture 7: Minor Disturbance, Action Potential, Passive Transport
23 Aug 2016
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Document Summary
Neurons perform all communication, information processing, and control functions of the nervous system. Neuroglia preserve physical and biochemical structure of neural tissue and are essential to survival and function of neurons. *connect to cell body at axon hillock ex of synapse neuromuscular junction. Nervous tissue: tissue composed of specialized cells that are able to create electrical messages and transmit these signals to other parts of the body. Sensory receptors of sense organs (eyes, ears, etc) Somatic nervous system (voluntary) - in individual control -- walking around something. Autonomic nervous system (involuntary) - not in individual control -- sneezing, heartrate. Prepares you to face danger or run away. Promotes building of energy reservoir, absorb nutrients, better digestive function. Sympathetic and parasympathetic are made of cardiac muscles, smooth muscles, glands. *fully specialized, differentiated cells, and rarely divide (post mitotic) Cancers are often of neuroglial cells because they divide uncontrolled.
