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प्रश्न
Why have reflex arcs evolved in animals?
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
Name one gustatory receptor and one olfactory receptor present in human beings.
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
One of the following controls the peristaltic movements of alimentary canal. This one is :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
Write down the following activities in the correct order for a simple reflex arc:
(a) impulse travels in the motor fibre
(b) impulse travels in the sensory fibre
(c) effector organ stimulated
(d) impulse crosses the synapse
Complete the following statement by choosing the correct alternative from the choice given in bracker:
Reflex action is controlled by
(i) brain (ii) spinal cord
(iii) autonomic (iii) peripheral nervous system
What type of reflex is the following?
Sweating in summer
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
A change in the environment that causes an animal to react is called ______.
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
