Nervous System

Question 1

What is the cerebellum? What are its main functions?

Answer 1

• Located behind the top part of the brain stem
• Coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.

Question 2

What is the cerebrum? What are its main functions?

Answer 2

The cerebrum is divided into four different part called lobes that control senses, thoughts, and movements.

Question 3

What is a neurone?

Answer 3

A specialised cell transmitting nerve impulses; a nerve cell.

Question 4

What is a nerve?

Answer 4

Bundle of fibres in the body that transmits impulses of sensation to the brain or spinal cord, and impulses from these to the muscles and organs.

Question 5

What is an enzyme?

Answer 5

A substance produced by a living organism which acts as a catalyst (motivation ) to bring about a specific biochemical reaction.

Question 6

Describe the ‘lock and key’ model

Answer 6

The lock is the enzyme and the key is the substrate. The correct ‘lock and key’ will create a reaction whereas the incorrect pair will create no reaction.