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प्रश्न
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
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उत्तर
(b) hindbrain
The hindbrain consists of three centres called the pons, the cerebellum and the medulla.
The forebrain consists mainly of the cerebrum.
The midbrain does not have any further divisions.
The spinal cord is a cylindrical structure.
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संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
With the help of a neat and labelled diagram, describe reflex arc.
What are the various sense organs in our body?
Give the various functions of brain.
Which of the following are cerebral reflexes?
(i) a person pulls away his hand on touching a hot object
(ii) a person spits out immediately when a fly enters his mouth while talking
(iii) A person walking bare foot lifts his foot at once on stepping on to a nail
(iv) A person's pupil contracts at once in the presence of bright light
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (ii) and (iv)
The part of brain which controls the involuntary action such as heart beat, breathing, blood pressure, etc. is :
(a) pons
(b) medulla
(c) cerebrum
(d) cerebellum
Define voluntary and reflex actions. Give examples of each.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Contraction of eye pupil
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sudden application of brakes of the cycle on sighting an obstacle in front
Explain the mechanism of reflex action with the help of a suitable diagram.
List in tabular form two differences between reflex action and walking.
List in tabular form three distinguishing features between cerebrum and cerebellum.
State whether the following is
Constriction of pupil
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Give an example for conditioned reflexes.
The reflex arc which is made up of one sensory and one motor neuron is ______
If after cutting through dorsal root of a spinal nerve of a mammal, the associated receptor in skin was stimulated the animal would ______.
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
