Understanding the Respiratory System

What is the primary function of the respiratory system in humans?

• To digest food

• To exchange gases

• To circulate blood

• To produce hormones

Which organ is primarily responsible for the exchange of oxygen and carbon dioxide in the respiratory system?

• Heart

• Liver

• Lungs

• Kidneys

What is the name of the tiny air sacs in the lungs where gas exchange occurs?

• Bronchi

• Alveoli

• Trachea

• Diaphragm

Which muscle plays a crucial role in the process of inhalation by contracting and creating a vacuum in the chest cavity?

• Diaphragm

• Intercostal muscles

• Abdominal muscles

• Pectoral muscles

What is the pathway that air follows when it is inhaled through the nose?

• Pharynx → Larynx → Trachea → Bronchi → Lungs

• Larynx → Pharynx → Trachea → Bronchi → Lungs

• Trachea → Larynx → Pharynx → Bronchi → Lungs

• Bronchi → Trachea → Larynx → Pharynx → Lungs

What is the term for the process of breathing out?

• Inhalation

• Exhalation

• Respiration

• Circulation

Which of the following is a common respiratory disease characterized by inflamed airways and difficulty breathing?

• Asthma

• Diabetes

• Hypertension

• Arthritis

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

• To produce mucus

• To filter and trap particles

• To exchange gases

• To absorb nutrients

Which part of the brain regulates the rate of breathing?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Hypothalamus

What is the main component of the air we breathe in?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen