Question

Human brain is formed of a large number of parts like cerebrum, thalamus, hypothalamus, pons, cerebellum and medulla oblongata. Each part performs some specialized function and all the parts are essential for the survival of a person. Discuss the following statements:

(a) Thalami are called relay centres of the brain. 

(b) Damage to medulla may cause the death of organism.

Answer 1

(a) Thalamus is composed of grey mater which serves as a relay centre for impulses between the spinal cord, brain stem and cerebrum. Thus acting as a major coordinating centre for sensory and motor signaling. Within the thalamus, information is sorted and edited and plays a key role in learning and memory.

(b) Medulla contains vital centres that control cardio vascular reflexes, respiration and gastric secretions. Therefore, damage to medulla may cause the death of an organism.