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nervous system
-Jocelyn Gomez period 1, Anatomy - Coggle Diagram
nervous system
-Jocelyn Gomez period 1, Anatomy
cranial nerves
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oculomotor (III)
-eyeball movement of upper eyelid, pupillary light reflex
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trigeminal (V)
-sensory: face, sinuses, teeth
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-Mandibular (chewing, facial sensation/structure)
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-Opthalmic (facial sensation, pupillary dilation)
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vagus (XI)
-motor: heart, lungs, bronchi, gastrointestinal tract
-sensory: heart, lungs, bronchi, trachea, larynx, pharynx, gastrointestinal tract, external ear
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MORE ABOUT NEURONS
neuron definition a neuron could be defined as a grayish granular cell that is a fundament unit of the nervous system
dendrites
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receive information from other neurons and transit electrical stimulation to the soma or the cell body of the neuron
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axon
elongated fibre of the neuron that extends from the soma to the terminal endings and transmits the neural signal
the larger diameter of the axon, the faster it can transmit information
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NEURONS AND NEUROGLIA
neurons
neurons are the cells of the nervous system, which receive and transmit nerve impulses
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the nerve impulses conducted by neurons with ling, slender projections called axons
neurons form synapses between two neurons and between neurons and also the sensory or effector group
the three forms of neurons are sensory neurons, motor neurons and interneurons
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neuron cell functions
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all neurons have three parts; dendrites, cell body, and axon
The neuron structure is specially adapted to carry messages over large distances in the body quickly in the form of electrical signals
NEUROTRANMITTERS
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a neurotransmitter signals travels from a neuron, across the synapse to the next neuron
neurotransmitters are important in boosting and balancing signals in the brain and for keeping the brain functioning
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noradrenaline
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contract blood vessels, increasing blood flow
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