what is a reflex
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reflex Definition of REFLEX for Kids. 1. : an action or movement that is made automatically without thinking as a reaction to a stimulus.2. an action or movement of the body that happens automatically as a reaction to something. : something that you do without thinking as a reaction to something.
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What is a Spinal Reflex? A spinal reflex is a reflexive action mediated by cells in the spinal cord, bypassing the brain altogether. A classic example is the kneejerk or patellar reflex, where the leg jerks when the kneecap is struck with a brisk tap. spinal reflex will bypass the brain and is an action only by the cells in the spinal cord.
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Digital single-lens reflex camera A digital single-lens reflex camera is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film. The reflex design scheme is the primary difference between a DSLR and other digital cameras. In the reflex design, light travels through the lens, then to a mirror that alternates to send the image to either the viewfinder or the image sensor. The traditional alternative would be to have a viewfinder wit
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- Reflex reactions in humans are controlled by the reflex arc. When the safety of an organism demands a very quick response, the signals may be passed directly from a sensory neuron, via a relay neurone, to a motor neurone for instant, unthinking action. This is a reflex action. A reflex arc is the nerve pathway which makes such a fast, automatic response possible. It does not matter how brainy you are - you will always pull your hand away from a flame without thinking about it. It is in-built, or innate, behaviour, and we all behave in the same way.
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- Purpose. A reflex is a simple nerve circuit. A stimulus, such as a light tap with a rubber hammer, causes sensory neurons (nerve cells) to send signals to the spinal cord. Here, the signals are conveyed both to the brain and to nerves that control muscles affected by the stimulus. reflex is a simple nerve circuit. A stimulus, such as a light tap with a rubber hammer, causes sensory neurons (nerve cells) to send signals to the spinal cord.
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reflex response, reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; a bad reaction to the medicine; his responses have slowed with age. knee jerk, knee-jerk reflex, patellar reflex - a reflex extension of the leg resulting from a sharp tap on the patellar tendon.
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I Have Low Back Pain And Was Told My Reflexes Are Weak. What Does That Mean? Answer: Reflex tests are simple physical tests of nervous system function. A reflex is a simple nerve circuit. A stimulus such as a light tap with a rubber hammer causes sensory nerves to send signals to the spinal cord. Here the signals are conveyed both to the brain and to nerves that control muscles affected by the stimulus.
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reflex Definition of REFLEX for Kids. 1. : an action or movement that is made automatically without thinking as a reaction to a stimulus.
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- Use of the straw is not response to stimulus, and therefore not a reflex. Reflexes follow a Reflex ARC. The Arc is through the spinal cord. While the information gets sent to the brain (you know you touched something hot, or you are choking and coughing), the reflex totally by-passes the brain. reflex is a quick involuntary action. There are five steps to a reflex: the stimulus occurs, the sensory neurons sense the stimulus, it sends a message to your spinal cord (… it doesn't reach the brain right then), the spinal cord sends a message to your motor neurons, and the reflex occurs.
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What You May Not Know About Reflexes A reflex is an involuntary movement to a stimulus. It is a relatively simple (but critical) way your body relays information that never reaches conscious awareness. Most of us take a lot of what the body does for us for granted, and that’s a good thing.
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Function: Voluntary and Involuntary Responses Reflexes. A reflex is an involuntary response to a stimulus, such as withdrawing your hand from a hot surface before you become aware of the heat. Most reflexes are processed in the spine, although some, such as blinking, are processed in the brain.
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- A reflex arc is a neural pathway that controls a reflex action. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.his characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain, although the brain will receive sensory input while the reflex is carried out. Analysis of the signal takes place after action has been taken.
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These Are All The Canadian Senators Under Fire For Various Reasons Disputed expenses of $48,088 have been referred to the RCMP. Oliver has repaid $23,395. Bill Rompkey: A Liberal senator from Newfoundland and Labrador 1995-2011, the former Liberal MP was appointed by Jean Chretien.Questioned expenses of $17,292 have been referred to the RCMP.od Zimmer: A Liberal senator from Manitoba 2005-2013, the former Liberal fundraiser was appointed by Paul Martin. Questioned expenses of $176,014 have been referred to the RCMP. Pierre Hugues Boisvenu: A prominent victim's rights activist, he was named a Conservative senator from Quebec by Harper in 2010.
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reflex reflex. a reflected involuntary action or movement; the sum total of any particular automatic response mediated by the nervous system. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect. positive reaction is a sharp contraction of the muscle of which the tendon is part. The patellar reflex is the best known of these reflexes. Absence indicates a defect in the reflex arc, an exaggerated response suggests an upper motor neuron lesion. Called also myotactic reflex.
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Reflex arc In human nervous system: Reflex actions …a reflex is called the reflex arc. It consists of an afferent (or sensory) nerve, usually one or more interneurons within the central nervous system, and an efferent (motor, secretory, or secreto-motor) nerve. Read More
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reflex re·flex. adj. 1. Physiology Being an involuntary action or response, such as a sneeze, blink, or hiccup. 2. Produced as an automatic response or reaction: reflex opposition to change.oun. 1. reflex-an automatic instinctive unlearned reaction to a stimulus. inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex action, reflex response, unconditioned reflex. accommodation reflex-reflex changes in the eyes that enable an object to be focused on the retina.
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- Sequence. In a simple reflex action: stimulus → receptor → sensory neurone → relay neurone → motor neurone → effector. An effector is any part of the body that produces the response.Here are some examples of effectors: 1  a muscle contracting.2  a gland releasing (secreting) a hormone or other chemical.eflex actions. When a receptor is stimulated, it sends a signal to the central nervous system, where the brain co-ordinates the response. But sometimes a very quick response is needed, one that does not need the involvement of the brain. This is a reflex action.
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Reflexes A reflex arc is a neural pathway that controls a reflex action. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. reflex arc is a neural pathway that controls a reflex action. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.
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Reflexes Reflex Arc. 1  A sensory receptor detects a stimulus. 2  A sensory neuron conducts action potentials through the spinal nerve and dorsal root to spinal cord. 3  in the spinal cord,the sensory neuron synapses with an interneuron. 4  The interneuron synapses with motor neuron.
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reflex a reflected action or movement; the sum total of any particular automatic response mediated by the nervous system. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect. The knee jerk is an example of the simplest type of reflex.
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- A reflex is an inbuilt mechanism (in our DNA). An automatic reflex  is important to protect the body. For example if you accidentally  place your hand on a hot stove, the re … flex pulls your hand from the  heatsource faster than your brain could have made the desicion.ne important aspect of reflex action is to help protect us without  having to think. Reflex actions are involuntary and quick. They are  done to meet an emergency and occur … at the level of the spinal  cord.
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- reflex definition An action or movement not controlled by conscious thought. A reflex may be anything from a hiccup to the involuntary response of a body part, such as the action that occurs in the knee-jerk reflex.
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gastroileal reflex A conditioned reflex is one acquired as the result of experience. When an action is done repeatedly the nervous system becomes familiar with the situation and learns to react automatically, and a new reflex is built into the system.ough reflex the sequence of events initiated by the sensitivity of the lining of the airways and mediated by the medulla as a consequence of impulses transmitted by the vagus nerve, resulting in coughing, i.e., the clearing of the passageways of foreign matter.
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reflex action reflex action. the involuntary functioning or movement of any organ or body part in response to a particular stimulus. The function or action occurs immediately, without the involvement of the will or consciousness.
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Reflexes Describe the components of a reflex arc. 1  Reflexes, or reflex actions, are involuntary, almost instantaneous movements in response to a specific stimulus.  Reflex arcs which contain only two neurons, a sensory and a motor neuron, are considered monosynaptic.
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acquired reflex A reflex, esp. a postural reflex, resulting from stimulation of receptors in the semicircular ducts, utricle, and saccule of the inner ear. This reflex helps orient the head in space and to the rest of the body.