Respiratory System

Which of the following gases makes up the largest proportion of air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Other gases

Which part of the respiratory system first filters dust from the air we breathe in?

• Windpipe

• Air sacs

• Nose

• Lungs

What connects the nose to the air tubes in the lungs?

• Air sacs

• Windpipe

• Diaphragm

• Blood vessels

Which of the following is a waste product of respiration that is removed when we exhale?

• Oxygen

• Sugar

• Carbon dioxide

• Energy

What causes asthma in many cases?

• Bacteria entering the lungs

• An allergy that makes the body overreact

• Smoking and air pollutants

• Cells in the lungs multiplying abnormally

Which symptom is common in both asthma and bronchitis?

• Tumor formation

• Coughing and wheezing

• Bacterial spread

• Enlarged air sacs

Which illness is directly caused by bacteria spreading through the air when an infected person sneezes or coughs?

• Asthma

• Tuberculosis

• Emphysema

• Lung cancer

In emphysema, what happens inside the lungs?

• Cells multiply uncontrollably to form tumors

• Air sacs collapse and eventually burst

• Bacteria damage the lung tissues

• Air tubes fill with mucus

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

• Allergic reaction to dust

• Overreaction of the immune system

• Exposure to poisonous gases and smoking

• Collapse of air sacs in the lungs

What is one way to prevent emphysema and lung cancer?

• Wearing a face mask in public

• Taking antibiotics regularly

• Avoiding smoking and polluted air

• Exercising to expand the ribcage