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प्रश्न
Why have reflex arcs evolved in animals?
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उत्तर
Reflex arcs have evolved in animals primarily because the thinking process of the brain is not fast enough to respond immediately to certain stimuli that require quick action for survival or response.
Many animals, especially simpler ones, lack a complex neuron network capable of fast thinking. Reflex arcs provide a more efficient way of functioning by enabling quicker responses to stimuli, bypassing the slower thinking processes.
This efficiency is vital for survival, allowing animals to respond instantly to dangers or other important stimuli. Even in animals with complex neural networks, reflex arcs remain crucial for ensuring immediate and efficient responses.
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संबंधित प्रश्न
How are involuntary actions and reflex actions different from each other?
State one function each of cerebellum and pons.
Which part of the eye contains cells which are sensitive to light?
Fill in the following blanks with suitable words :
Our.............system allows us to react to our surroundings. Information from receptors passes along...........neurons to our brain. Our brain sends impulses along..........neurons to our muscles.
A person walks across a room in barefeet and puts his foot on a drawing pin lying on the floor. He lets out a cry. Explain what happens in his nervous system in bringing about this response.
Which of the following statements are true?
(i) sudden action in response to something in the environment is called reflex action
(ii) sensory neurons carry electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
Give one example of a conditioned reflex in your own life.
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Blinking
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
