Science Form 3 Chapter 2.1

Which of the following is not part of the respiratory system?

• lungs

• trachea

• esophagus

• bronchi

Which of the following is the correct sequence of structures air passes through when entering the body?

• a) larynx, trachea, bronchi, alveoli

• b) trachea, bronchi, alveoli, larynx

• c) alveoli, bronchi, larynx, trachea

• d) larynx, bronchi, trachea, alveoli

Which of the following is the main function of the respiratory system?

• a) to circulate blood throughout the body

• b) to remove waste from the body

• c) to exchange gases with the environment

• d) to digest food

Which structure produces mucus that helps trap dirt and germs before they can reach the lungs?

• a) trachea

• b) bronchi

• c) larynx

• d) nose

Which structure in the respiratory system contains tiny air sacs where gas exchange occurs?

• a) bronchi

• b) alveoli

• c) trachea

• d) larynx

Which muscle is responsible for the majority of the work involved in breathing?

• a) diaphragm

• b) intercostal muscles

• c) trapezius

• d) biceps brachii

Which of the following is not a respiratory disorder?

• a) asthma

• b) emphysema

• c) diabetes

• d) bronchitis

Which of the following is a common cause of lung cancer?

• a) smoking

• b) excessive exercise

• c) exposure to loud noise

• d) eating a high-fat diet

Which gas do humans inhale?

• a) oxygen

• b) carbon dioxide

• c) nitrogen

• d) hydrogen

Which of the following is not a function of the nose in the respiratory system?

• a) to warm and moisten incoming air

• b) to filter out dust and germs

• c) to exchange gases with the environment

• d) to help with the sense of smell