Q14 of 62 Page 192

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

When a person will suffer from severe cold he or she will not be able to detect the smell of agarbatti or a perfume because during severe cold the olfactory receptors of the person get affected due to which he/she can’t recognise any kind of smell. All other receptors for taste, touch and vision can’t get affected in severe cold. So, they can easily detect anything related to taste, sight and touch.

Therefore, correct option is (b).

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12

Involuntary action in the body are controlled by:

 13

Which of the following is not an involuntary action?

 15

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.

 16

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.