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प्रश्न
The contraction of pupil of the eye in the presence of bright light is an example of :
(a) Voluntary reflex
(b) Spinal reflex
(c) Cerebral reflex
(d) Adrenal reflex
उत्तर
(c) cerebral reflex
The contraction of the pupil of the eye in the presence of a bright light is an example of cerebral reflex. A reflex action that involves the brain is called cerebral reflex. It is found in the organs present in the head that are directly connected to the brain.
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संबंधित प्रश्न
Which part of the eye contains cells which are sensitive to light?
Give three examples of reflex actions.
All the voluntary actions of our body are controlled by :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
The part of brain which takes part in regulating respiration in the human body is :
(a) medulla
(b) pons
(c) cerebellum
(d) cerebrum
One of the following gives the correct sequence of the components in a reflex arc. This is:
The olfactory receptors in humans are located in :
(a) eyes
(b) tongue
(c) ears
(d) nose
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
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
Explain the mechanism of reflex action with the help of a suitable diagram.
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
