Respiratory Systems in the Living Environment

What is the main function of the human respiratory system?

• Produce hormones

• Regulate body temperature

• Facilitate the exchange of oxygen and carbon dioxide

• Digest food

Which organ is responsible for the exchange of oxygen and carbon dioxide in the body?

• liver

• stomach

• kidneys

• lungs

What is the name of the tube that carries air into the lungs?

• bronchi

• esophagus

• trachea

• pharynx

What is the role of the diaphragm in the process of breathing?

• It contracts and flattens to create more space in the chest cavity during inhalation.

• It expands and contracts to push air out of the lungs

• It has no role in the process of breathing

• It helps to filter the air entering the lungs

What are the tiny air sacs in the lungs where gas exchange occurs called?

• Alveoli

• Alveolar sacs

• Pulmonary vessels

• Bronchioles

What is the medical term for the windpipe?

• esophagus

• bronchus

• pharynx

• trachea

What is the average number of breaths an adult takes per minute at rest?

• 12-20 breaths per minute

• 30-40 breaths per minute

• 50-60 breaths per minute

• 5-10 breaths per minute

What are the two main gases exchanged during respiration?

• oxygen and carbon dioxide

• carbon dioxide and methane

• oxygen and nitrogen

• nitrogen and hydrogen

What is the name of the condition where the airways become narrow and inflamed, leading to difficulty breathing?

• Bronchitis

• Pneumonia

• Emphysema

• Asthma

What are the three main functions of the nasal cavity in the respiratory system?

• Cooling, dehumidifying, and purifying the air

• Filtering, humidifying, and warming the air

• Expelling, deodorizing, and pressurizing the air

• Moistening, cooling, and pressurizing the air