Coordination in animals <br />Nervous Coordination <br />Elements of Nervous system <br />1. Neurons <br />The chief structural and functional units of the Nervous system are Neurons. <br />Neuroglia <br />Types of Neurons. <br />1. The Sensory Neurons. <br />2. Associative Neurons. <br />3. Motor Neurons. <br />Structure of Neurons. <br />Dendron <br />cell body <br />2. Receptors <br />They detect changes in the environment of the animal <br />Classification of Receptors <br />a) Chemoreceptor <br />b) Mechanoreceptor <br />c) Photoreceptor <br />d) Thermoreceptor <br />e) Nociceptor <br />3. Effectors <br />These are the structure which respond when they are stimulated by impulse coming via motor neuron <br />Nerve Impulse <br />it is a wave of electrochemical changes , which travel along the length of the neuron involving chemical reactions and movements of ions across the cell membrane . <br />Electric potential <br />Membrane Potential <br />Resting Membrane Potential (RMP) <br />Coordination and Control <br />Chapter No.17 <br />Biology <br />Part 2