A) medulla oblongata
B) mesencephalon
C) hypothalamus
D) cerebellum
Correct Answer: A
Solution :
Medulla oblongata is cylindrical conical hinder most part of brain, which has an internal cavity called fourth ventricles. It has (i) Respiratory centre (ii) Cardiac centre (iii) Reflex centre for swallowing, vomiting, peristalsis, secretion and actively of alimentary canal, salivation, coughing, sneezing etc. (iv) Vaso moter centre. Mesencephalon (mid brain) contains group of nerve cells scattered in white matter. The nerve cells are involved in controlling muscle tone and modifying some moter activities. Hypothalamus is the floor of diencephalon and is connected with brain stem. It maintains homeostasis and bodys internal equilibrium and controlling involuntary behaviour. Cerebellum lies behind the cerebrum and above medulla oblongata. It is the second largest part, which is very well developed in humans. It is essential for controlling rapid muscular activities, equilibrium of body, moderation of voluntary movement, maintenance of muscle tones.
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