HUMAN PHYSIOLOGY
CONTROL AND COORDINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To close eye on falling light.
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To draw back leg when it touches sharp object.
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To move knee on hitting.
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All the above
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Detailed explanation-1: -For example, if you put your hand on a hot stove, a reflex causes you to immediately remove your hand before a “Hey, this is hot!” message even gets to your brain. Other protective reflexes are blinking when something flies toward your eyes or raising your arm if a ball is thrown your way.
Detailed explanation-2: -Coughing, yawning and blinking of eyes are examples of reflex actions.
Detailed explanation-3: -Blinking reflex: blinking the eyes when they are touched or when a sudden bright light appears. Cough reflex: coughing when the airway is stimulated. Gag reflex: gagging when the throat or back of the mouth is stimulated. Sneeze reflex: sneezing when the nasal passages are irritated.
Detailed explanation-4: -Reflex action is a sudden and involuntary response to stimuli. It helps organisms to quickly adapt to an adverse circumstance that could have the potential to cause bodily harm or even death. Pulling our hands away immediately after touching a hot or cold object is a classic example of a reflex action.