NCERT Solution for Class 10 Science Chapter 7
Control and Coordination
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-119
Questions No-1
What is the difference between a reflex action and walking?
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NCERT Solution for Class 10 Science Chapter 7
Control and Coordination
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-119
Questions No-1
• A reflex action is a rapid, automatic response to a stimulus. It does not involve any thinking. For example, we close our eyes immediately when the bright light is focused.
• Walking, on the other hand, is a voluntary action. It is under our conscious control.
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Reflex action is performed by automatically. It is control and coordinated by the spinal cord. It is an involuntary action.
Walking is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. Brain instructs and controls the muscles of the leg to for moving. It is a voluntary action.
A reflex action is an involuntary action which is a rapid and automatic response to stimuli.
Walking is a voluntary action, which requires our thinking and is within our control.
A reflex action is a rapid, automatic response to a stimulus. It does not involve any thinking. It is an involuntary action which is a rapid and automatic response.
Walking, on the other hand, is a voluntary action, which requires our thinking and is within our control. It is performed as per the instructions of the brain.
Reflex action are the involuntary actions that occur in response to stimuli. They occur
without involvement of conscious areas of brain. All the reflex actions are unconscious
actions. Reflex action occurs brain and spinal cord of central nervous systems.
On the other hand voluntary actions are those which occur under the control of cerebellum of the brain Walking is learnt as we grow. Walking is controlled by brain as is used when
required.
Walking is a voluntary action and is part of routine activities. On the other hand, reflex action is involuntary and happens as a response to a sudden danger to a voluntary organ.
Reflex action is a nerve mediated, automatic involuntary response to a stimulus without consulting the will. It is controlled by spinal cord. it needs an instantaneous response to a stimulus where delay can be harmful. On the other hand, walking in a straight line is a conscious, voluntary response. It is controlled by a part of hind-brain called cerebellum. It does not need an instantaneous response.
Reflex actions and walking are two different types of motor responses controlled by the nervous system, and they differ in terms of their characteristics, mechanisms, and purposes.
1. Reflex Action:
» Definition: A reflex action is an automatic, involuntary, and rapid response to a stimulus. It occurs without conscious thought or decision-making and is typically mediated by a reflex arc—a neural pathway that includes a sensory receptor, sensory neuron, motor neuron, and an effector (usually a muscle or gland).
» Characteristics:
» Involuntary: Reflex actions are involuntary, meaning they occur without conscious control.
» Rapid: Reflex actions are usually very quick, allowing the organism to respond rapidly to a potentially harmful stimulus.
» Local: The response is often localized to the area where the stimulus occurred.
» Examples: The classic example of a reflex is the knee-jerk reflex, where tapping the patellar tendon causes a quick contraction of the quadriceps muscle and extension of the knee.
2. Walking:
» Definition: Walking is a coordinated, voluntary motor activity that involves a series of complex movements and interactions between various muscles and joints. It is a learned behavior that requires input from higher brain centers and is under conscious control.
» Characteristics:
» Voluntary: Walking is a voluntary action, meaning it is under conscious control. Individuals can decide to initiate, stop, or change the pace of walking.
» Coordinated Movements: Walking involves a coordinated sequence of muscle contractions and joint movements, requiring input from the brain’s motor centers.
» Purposeful: Walking serves a purpose in terms of locomotion, allowing an organism to move from one place to another.
» Examples: Walking is a fundamental motor skill that humans and many animals learn and refine over time. It involves the integration of sensory input, balance, and muscle coordination.
In summary, the key differences lie in the voluntary or involuntary nature of the actions, the speed of response, and the complexity of the movements. Reflex actions are quick, involuntary responses to specific stimuli and are mediated by a reflex arc. Walking, on the other hand, is a voluntary, purposeful, and coordinated motor activity that involves conscious control and a more complex integration of neural signals.