Science DT2 Year 9 Flashcards
What is gas exchange?
The process of exchanging gases inside the lungs, occurring in the alveoli.
Where does gas exchange occur?
In the alveoli.
What is absorbed into the bloodstream during gas exchange?
Oxygen.
What is the difference between breathing and respiration?
Breathing is a mechanical action, while respiration is a chemical reaction.
What structures does inhaled air pass through?
Trachea, bronchi, bronchioles, alveoli.
What happens as the diaphragm contracts?
Carbon dioxide is pushed out, and oxygen is absorbed into the blood.
What is the role of the left side of the heart?
Pumps oxygenated blood into the aorta.
What does the pulmonary artery do?
Pumps de-oxygenated blood to the lungs.
What does the pulmonary vein do?
Pumps oxygenated blood from the lungs.
What can cause heart attacks related to the coronary arteries?
Blockage with fatty deposits.
What are common triggers for an asthma attack?
Dust, animal fur, pollen, tobacco, exercise, cold air, or respiratory infections.
What happens to the trachea during an asthma attack?
The lining becomes irritated and swells, potentially blocking the airway.
Fill in the blank: The __________ arteries supply blood to the heart muscle.
coronary
True or False: The pulmonary veins are the only veins that carry oxygenated blood.
True.
What is the effect of too much mucus during an asthma attack?
It blocks the trachea, making it harder to breathe.
