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Dafe, Page, 2. CONTROL AND, COORDINATION, dntroduction, → All the living, changes in O the, 0nganisms respond and Teact to, enviTonment ground them., The changes in the envinonment to which, in the environment, organis ms respond, such, the, and, reacts, called, cold, sound, Stimuli, Smell,, as light, heat,, are, touch, etc., → Both, but in, plants $ animals respond to stimuli, different manner, Systems for Control and Coordinalion in Antmals, in animals, is, Control 8 Co0rdina Hon, done, the help of two main systems:, system, system., with, Neovous, Endocrine, Nervous System, Control 8 coordinatlon gre provided by, tissues., nervous 8 musculaY, Nervous tissue is made up of an organized, network 0f nerve cells Or, specialized for conducting i, eiectrical impulses from, which is, information Via., part of body, neurons, one

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Page, to another,, Receptors, These, Specialized tips of some nerve, 9re, cells, that, detect, the information from, the environment., These., located in, e 07gans-, 9re, our sense, 1 Ear : Acts a sound)., o phonoreceptors (receiving, → Helps in hearing and malntainisg, Helps in bear, balance of, maintai, nislg the, y Eyes, :- Acts, - Helps in seeing., as photoreceptors. (recel, sdiving light., Skin :- Acts, temperature)., → Helps in feeling, as thermoreceptor (feels, 1, heat or cold and, touch., as olfactory receptors (sense of, teseo). Smell)., iV Nose :- Acts, -, ) Helps fn, the detecton of taste., vj Tongue :- Acts as Gustatony Teceptors., (sense of taste), ) Helps in the, detection of ta ste

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Neuron, →gt is the structunal and functronal unit, of nervous system., Dendrite-, Alucleus, Axon, cell body, Nerve ending., nt)., Functioning_of_NeuTOn., The, in formation from receptors is acquired, at the end of dendritic tip of a, chemical, electric impulse., reaction, that, nerve, cell, as, Creates, an, impulse travels from the dendrite, to the cell body and, end of the, of, then at the, 9xon., released at the end of, - Chemicals, by, are, axon the ., effect of electric impulse, the gaplsynapse) and, - These chemicals, Starts, dendrite of, CTOSS, similar electrícal impulse in, the, next, neuron

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Page, →The similao, 0f such, to other cells, synapse finally, impulses, such as, 160V0914, allows delivery, from neurong, muscles, or, gland., O Parts 0f NeUTon, Dendrite 1t acquires information, → The acquired, by, electric împulse, cell, Body,, information, it, travels, an, iii Axon, Longest frbre on, cell body, the, called, → It transmits, eell, axon., electo ical împulse from, l body to dendaite of next neuron., synapse t is, the gap b/w the nerve, AlUTon ending of, dendrite ofU the other, Here, Aeuron, one, neuron, and, neuron., electorc is conrerted, chemical, signal, signat for, into, Onward, trans mission., * Reflex Action., - It is, quick, Sudden and immediate, response of the body to a stimulus, Knee jeok, withdrawal o f hand, eg., on, touching hot obgect: