CRIM 3250 Lecture Notes - Lecture 13: Secondary Source, Morphine, Codeine

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bmgartner

10 Nov 2020

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Nervous system - the network of nerve cells and fibers that transmits nerve impulses between parts of the body. Made up of the brain, spinal chord, and all of the connective neurons that communicate with the organs and tissues of the body. Allows the body to receive internal and external information and formulate the appropriate response. All nervous systems consist of specialized cells called glia and neurons. Glia - non-neuronal cells that help maintain homeostasis. Critical for protecting neurons (necessary for them to survive) Surround neurons and hold them in place. Help destroy pathogens and remove dead neurons. Neurons - nerve cells that conduct the homeostatic functions of the brain and other parts of the nervous system. Fundamental building blocks for the system as a whole. Can send different types of messages to their target cells or organs. We distinguish them by the type of neurotransmitter they send.

Related Questions

Nerve cells that conduct messages are called (1) ____. (2) _____ cells, which support and nurture the activities of neurons, make up less than half the volume of the nervous system. (3) _______ neurons respond to specific kinds of environmental stimuli, (4) ______ connect different neurons in the spinal cord and brain, and (5) ______ neurons are linked with muscles or glands. All neurons have a (6) _______ ________ that contains the nucleus and the metabolic means to carry out protein synthesis. (7) _______ are short, slender extensions of the (6), and together these two neuronal parts are the neuronsâ âinput zoneâ for receiving (8) _____. The (9) _____ is a single long, cylindrical extension away form the (10) ______; in motor neurons, the (11) ______ has finely branched (12) ________ that terminate on muscle or gland cells and are âoutput zones,â where messages are sent on to other cells. A neuron at rest establishes unequal electric charges across its plasma membrane, and a(n) (13) ____ ____ is maintained. Another name for (13) is the (14) _____ _____ _____; it represents an ability for the membrane to be disturbed. Weak disturbances of the neuronal membrane might set off only slight changes across a small patch, but strong disturbances can cause a(n) (15) _______ ______, which is an abrupt, short-lived reversal in the polarity of charge across the plasma membrane of the neuron. For a fraction of a second, the cytoplasmic side of a bit of membrane becomes positive with respect to the outside. The (16) ______ that travels along the neural membrane is nothing more than short-lived changes in the membrane potential. A. Neurons H. Sensory B. Motor I. Endings C. Interneurons J. Disturbance D. Cell body K. Signals (stimuli) E. Axon L. Voltage differential F. Dendrites M. Resting membrane potential G. Neuroglial N. Action potential

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CRIM 3250 Lecture Notes - Lecture 13: Secondary Source, Morphine, Codeine

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