BIOL239 Lecture Notes - Lecture 2: Gas Constant, Membrane Potential, Microglia

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The nervous system is a complex network of neurons that form the rapid control system of the body: receives information: using sensory neurons (receptors) from external environment. Integrates information: organizes the info and brings it together with already stored info. 2: transduces information: sends appropriate signals to muscles or glands. Organization of the nervous system: there are 2 main parts, central nervous system (cns) Brain, spinal cord: peripheral nervous system (pns) Consists of nerves- bundles of axons of sensory or motor neurons existing outside the. Receptors, peripheral nerves and ganglia: receptors: specialized cells, convert stimuli into electrical signals, transmit info to afferent neurons, sensory (afferent) neurons: bring info to the cns, receive info from receptors, cell bodies located outside the cns. Long cytoplasmic extensions transmit information to interneurons within the cns. 96% of all neurons: transmit either laterally within the spinal cord, or vertically to the brain.

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