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प्रश्न
What is the role of the brain in reflex action?
उत्तर
Reflex actions are sudden responses, which do not involve any thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking as thinking may take time which would be enough to get us burnt. The sensory nerves that detect heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is called a reflex arc. The reflex arcs − connections present between the input and output nerves − meet in a bundle in the spinal cord.
Reflex arcs are formed in the spinal cord and the information (input) reaches the brain. The brain is only aware of the signal and the response that has taken place. However, the brain has no role to play in the creation of the response.
संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
How are involuntary actions and reflex actions different from each other?
With the help of a neat and labelled diagram, describe reflex arc.
Write the names of the regions in hindbrain. Give one function of each region.
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.
Give the various functions of brain.
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
The olfactory receptors in humans are located in :
(a) eyes
(b) tongue
(c) ears
(d) nose
Differentiate between the following pair of terms:
Stimulus and impulse
With the help of suitable example, describe reflex action.
List in tabular form two differences between reflex action and walking.
State whether the following is
Playing on the Keyboard
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Blinking of the eye
Give Technical Term:
Response to a stimulus without the intervention of the will of an animal.
Mention, if the following statement is True or False
A reflex action is a spontaneous response to a stimulus.
A change in the environment that causes an animal to react is called ______.
Give an example for conditioned reflexes.
If after cutting through dorsal root of a spinal nerve of a mammal, the associated receptor in skin was stimulated the animal would ______.
