Pleasant smell fo food urged Ravi to Rush into the kitchen. Name the parts of the brain involved in the identification of food and emotional responses to odour.

(a) When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance quickly spreads in the entire room. Name the process involved in this. (b) A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.

Select the option which describes the correct parts of the human brain with the functions mentioned below: I. It contains association areas that are responsible for complex functions like intercessory associations, memory and communication. II. It controls osmolarity of body fluids, urges for eating and drinking. III. It is involved in the regulation of sexual behaviour , expression of emotional reactions. IV. It controls cardio - vascular reflexes and gastric secretions.

Select the option which describes the correct parts of the human brain with the functions mentioned below: I. It contains association areas that are responsible for complex functions like intercessory associations, memory and communication. II. It controls osmolarity of body fluids, urges for eating and drinking. III. It is involved in the regulation of sexual behaviour , expression of emotional reactions. IV. It controls cardio - vascular reflexes and gastric secretions.

The human brain is divided into forebrain, midbrain and hindbrain. Select correct option which contains only correct option. i. The cerebral cortex contains motor areas, sensory areas and large association areas ii. Association areas are clearly sensory and motor in function and it related with complex functions like inter sensory association, memory and communication iii. Thalamus is a major coordinating centre for sensory and motor signalling iv. The hypothalamus contains a number of centres which control body temperature, urge for eating and drinking v. The inner parts of cerebral hemispheres, amygdale, hippocampus, etc., form a complex structure called the limbic lobe or limbic system vi. Along with the hypothalamus, limbic system is involved in the regulation of sexual behaviour, expression of emotional reactions and motivation vii. A canal called the cerebral aqueduct passes through the hindbrain viii. The medulla contains centres which control respiration, cardiovascular reflexes and gastric secretions