Impact of Asthma, Smoking, and Exercise on Breathing

What is the primary function of the lungs in the human body?

• To produce hormones

• To exchange gases

• To circulate blood

• To digest food

How does asthma affect the bronchioles?

• It strengthens them

• It constricts them

• It shortens them

• It expands them

What triggers asthma symptoms?

• Excessive exercise

• Cold temperatures

• Dust and pollution

• High humidity

What substance in cigarettes is responsible for clogging the cilia?

• Carbon monoxide

• Formaldehyde

• Nicotine

• Tar

What happens to the alveoli as a result of smoking?

• They become larger

• They increase in number

• They become more elastic

• They have less elastic walls

How does smoking affect the surface area of alveoli?

• Increases it

• Decreases it

• Keeps it the same

• Doubles it

Which of the following is a positive effect of regular exercise on the lungs?

• Increased mucus production

• Constriction of bronchioles

• Decreased blood flow

• Development of more alveoli

What role does the diaphragm play in breathing?

• It filters air

• It strengthens the lungs

• It helps draw air in and push it out

• It produces mucus

What is the effect of exercise on the blood vessels around the alveoli?

• Increases their number

• Clogs them with tar

• Makes them less elastic

• Reduces their number

What is the result of better gas exchange due to exercise?

• Less oxygen in the blood

• More carbon dioxide in the blood

• More oxygen in the blood

• Less air in the lungs