Respiratory System

What is the primary function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases (oxygen and carbon dioxide)

• To filter waste from the blood

Which of the following is NOT part of the upper respiratory tract?

• Nasal cavity

• Pharynx

• Larynx

• Alveoli

What is the role of the alveoli in the respiratory system?

• To warm and moisten the air

• To produce vocal sounds

• To facilitate the exchange of gases between air and blood

• To filter out dust and pathogens

Which structure acts as a passageway for both air and food?

• Trachea

• Pharynx

• Larynx

• Bronchi

What is the function of the cilia in the respiratory system?

• To exchange gases

• To produce mucus

• To move mucus and trapped particles away from the lungs

• To absorb nutrients

Which of the following is the correct pathway of air entering the respiratory system?

• Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

• Nasal cavity → Larynx → Pharynx → Trachea → Bronchioles → Bronchi → Alveoli

• Nasal cavity → Pharynx → Trachea → Larynx → Bronchi → Alveoli → Bronchioles

• Nasal cavity → Pharynx → Larynx → Bronchioles → Trachea → Bronchi → Alveoli

What is the primary muscle involved in the process of breathing?

• Pectoralis major

• Diaphragm

• Intercostal muscles

• Abdominal muscles

The trachea divides into two branches known as:

• Alveoli

• Bronchioles

• Bronchi

• Pharynx

What is the term used to describe the tiny air sacs in the lungs?

• Bronchioles

• Alveoli

• Ventricles

• Atria

Which part of the respiratory system is commonly known as the voice box?

• Pharynx

• Larynx

• Trachea

• Bronchi