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प्रश्न
Mohan is fond of playing basketball. His concentration is on shooting the ball into the opponent's basket as given in the picture.
- Which part of the brain helps Mohan to concentrate in putting the ball into the basket?
- Name the sense organ that helps to gauge the distance between the ball and the basket.
- Name the part of the brain that co-ordinates all the voluntary muscles of his body.
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उत्तर
- Forebrain cerebellum. The cerebral cortex contains motor and sensory centres, as well as large regions with no obvious sensory or motor activities. These regions, known as association areas, are in charge of complex functions such as connecting multiple senses, storing memories and facilitating communication.
- The eyes help to observe and judge the distance between the ball and the basket. They provide messages to the brain, which subsequently makes the appropriate judgements.
- The hindbrain cerebellum. The cerebellum is positioned near the back of the brain and is in charge of coordinating voluntary muscle movements as well as maintaining posture, balance and equilibrium.
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संबंधित प्रश्न
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Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’.
| Column I | Column II | ||
| (i) | Auditory canal | (a) | Channels pressure waves of air into the middle ear. |
| (ii) | Auditory (Eustachian tube) | (b) | Collects pressure waves of air. |
| (iii) | Auditory nerve | (c) | Converts pressure waves of air into vibrations of bone. |
| (iv) | Incus | (d) | Dissipates sound waves. |
| (v) | Malleus | (e) | Equalizes pressure between the middle ear and the atmosphere. |
| (vi) | Oval window | (f) | Provide information about the spatial orientation of the head. |
| (vii) | Pinna | (g) | Transfers vibrations from a bone to a fluid. |
| (viii) | Round window | (h) | Transfers vibrations from a bone to a membrane. |
| (ix) | Semi-circular canal | (i) | Transfers vibrations from a bone to a bone. |
| (x) | Stapes | (j) | Transfers vibrations from a membrane to a bone. |
| (xi) | Tympanic membrane | (k) | Transmits action potential to the auditory cortex. |
Short answer question
Give a reason - Injury to medulla oblongata may prove fatal.
The cerebrum controls the voluntary actions of our body.
