Question

The diagram shows a section of the human brain. Answer the questions that follow :

(i) Name the parts labelled A, B and C. 

(ii) Give the main function of each of the parts A, B, and C. 

(iii) Name the three protective membranes covering the brain. 

(iv) Name the basic unit of the brain.

Answer 1

(i) Part A = Cerebrum 

Part B = Cerebellum 

Part C = Medulla oblongata. 

(ii) Cerebrum: It is the site of controlling memory, reasoning, thinking, perception, emotions and speech. 

Cerebellum: It maintains posture equilibrium and muscular co-ordination. 

Medula Oblongata: It contains centre for cardiac, respiratory and vasomotor activities. It also co-ordinates reflexes for swallowing, coughing, sneezing and vomiting. 

(iii) Three protective membranes covering the brain are : duramater, piamater and arachnoid. 

(iv) The basic unit of brain is neuron.