Question

The diagram given below is an external view of the human brain. Study the same and answer the questions that follow:

1. Name the parts labelled A, B and C in the diagram.
2. State the main functions of the parts labelled A and B.
3. What are the structural and functional units of the brain? How are the parts of these units arranged in A and C?
4. Mention the collective term for the membranes covering the brain.
5. What is the function of cerebrospinal fluid?

The diagram given below is an external view of the human brain. Study the same and answer the questions that follow:

1. Name the parts labelled A, B and C in the diagram.
2. State the main functions of the parts labelled A and B.
3. What are the structural and functional units of the brain? How are the parts of these units arranged in A and C?
4. Mention the collective term for the membranes covering the brain.
5. What is the function of cerebrospinal fluid?

Answer 1

1. A: Cerebrum
   B: Cerebellum
   C: Spinal Cord
2. Function of part A (Cerebrum): It is the site of intelligence, memory and consciousness.
   Function of part B (Cerebellum): Coordinates muscular activity and helps balance the body.
3. Neurons are the structural and functional units of the brain.
   1. In part A (Cerebrum), the outer portion contains cell bodies and the inner portion contains the axons of the neurons.
   2. In part C (Medulla oblongata), the outer portion contains axons and the inner portion contains the cell bodies of the neurons.
4. Meninges
5. Cerebrospinal fluid (CSF) acts as a cushion and protects the brain from mechanical shocks.