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reflex |
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reflex: see nervous system nervous system, network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system. ..... Click the link for more information. . reflexIn biology, an automatic and inborn response to a stimulus that involves a nerve impulse passing from a sensory nerve cell to a muscle or gland without reaching the level of consciousness. Simple reflexes include sucking, swallowing, blinking, scratching, and the knee jerk. Most reflexes consist of complex patterns of many unconsciously coordinated muscular actions that form the basis of much instinctive behavior in animals. Examples include walking, standing, the cat's righting reflex, and basic sexual acts. |
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| It is customary to divide human movements into three classes, voluntary, reflex and mechanical. Nothing in the picture moved but Old Pretty's tail and Tess's pink hands, the latter so gently as to be a rhythmic pulsation only, as if they were obeying a reflex stimulus, like a beating heart. Perhaps this, too, was a disease, and but the reflex of the wild energy with which Hester had fought against her sorrows before Pearl's birth. |
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reflex
