Q16 of 62 Page 192

Which of the following statements are true about the brain?

(i) The main thinking part of brain is hindbrain


(ii) Centres of hearing, smell, memory, sight, etc., are located in forebrain.


(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.


(iv) Cerebellum does not control posture and balance of the body.

All other statements except (ii) and (iii) are incorrect because forebrain is responsible for thinking process and cerebellum controls posture and balance of the body. Statement (ii) and (iii) are true in their sense. Therefore, correct option is (c) (ii) and (iii).

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Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action


(ii) Sensory neurons carry signals from spinal cord to muscles


(iii) Motor neurons carry signals from receptors to spinal cord


(iv) The path through which signals are transmitted form a receptor to a muscle or a gland is called reflex arc.

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Posture and balance of the body is controlled by:

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Spinal cord originates from: