ESS: Respiratory System

What is the primary function of the respiratory system?

• To supply oxygen to the body and remove carbon dioxide

• To protect the body from infections

• To circulate blood throughout the body

• To digest food and absorb nutrients

Which component of the respiratory system is also known as the windpipe?

• Larynx

• Alveoli

• Trachea

• Bronchi

What is the function of the alveoli?

• To filter air

• To produce sound

• To enable gas exchange

• To transport gases between the trachea and bronchioles

During inhalation, what happens to the diaphragm?

• It relaxes and bulges upwards

• It contracts and flattens

• It remains unchanged

• It moves sideways

What percentage of oxygen is present in inhaled air?

• 79%

• 21%

• 3%

• 17%

Which component prevents food from entering the windpipe?

• Larynx

• Epiglottis

• Nasal passage

• Bronchi

What is the role of the intercostal muscles during inhalation?

• They filter air

• They produce sound

• They contract and expand the chest

• They relax and contract the chest

What is the function of the bronchioles?

• To prevent food from entering the lungs

• To filter air

• To produce sound

• To transport gases between the bronchi and alveoli

What happens to the pressure inside the lungs during exhalation?

• It fluctuates

• It increases

• It decreases

• It remains the same

What is the vital capacity of the lungs?

• The maximum amount of air that can be exhaled after inhaling as much as possible

• The number of breaths taken per minute

• The total amount of air the lungs can hold

• The amount of air inhaled or exhaled during normal breathing