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प्रश्न
Which of the following is not involved in Knee-jerk reflex?
पर्याय
Muscle spindle
Motor neuron
Brain
Inter neurons
उत्तर
Brain
Explanation:
Brain is not involved in knee-jerk reflex.
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संबंधित प्रश्न
Briefly explain the following terms : Reflex action
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.
One of the following controls the peristaltic movements of alimentary canal. This one is :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
One of the following gives the correct sequence of the components in a reflex arc. This is:
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
When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our fingers. The receptor triggers and impulse in neuron Q which transmits the message to an organ R which is a part of the central nervous system. Here the impulse is passed on to a neuron S which in turn passes it to a yet another neuron T. The neuron T passes the impulse to a tissue U in our arm. The tissue U then contracts and pulls our hand away from the hot plate.
(a) What is the name of (i) receptor P (ii) neuron Q, and (iii) organ R?
(b) What is (i) neuron S, and (ii) neuron T?
(c) Name the tissue U.
(d) What name is given to the phenomenon in which hand is pulled away quickly from the hot plate?
(e) Name the effector in this whole process.
With the help of suitable example, describe reflex action.
What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.
The given diagrammatic representation of reflex action shows knee jerk reflex.
Identify the parts labeled as A to E and select the correct option.
Which sensory organ is involved in vertigo (sensation of oneself or objects spinning around)?
