Q15 of 62 Page 192

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.

Statements (ii) and (iii) are wrong in their sense because sensory neurons carry signals from receptors to spinal cord and motor neurons carry signals from spinal cord to the muscles. Statement (i) and (iv) are true and therefore correct option is (c).

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Which of the following is not an involuntary action?

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When a person is suffering from severe cold, he or she cannot:

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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.

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Posture and balance of the body is controlled by: