Which structure separates the thoracic cavity from the abdomen?
What is the primary function of the intercostal muscles?
Which part of the respiratory system branches into smaller ducts throughout the lungs?
What is the main function of alveoli?
The pleural membranes create a space that reduces friction during breathing.
During inhalation, the diaphragm moves...
What type of respiration produces ATP without using oxygen?
What is the word equation for aerobic respiration?
Smoking can lead to increased risk of coronary heart disease.
What is released as a byproduct of anaerobic respiration in animals?
Which of the following are consequences of smoking related to the lungs? (Select all that apply)
How do alveoli increase their efficiency in gas exchange?
What is the immediate effect of exercise on breathing rate?
Which characteristics are true about aerobic respiration? (Select all that apply)
The diaphragm is the primary muscle used for ventilation.
What aids the movement of air in and out of the lungs?
Which structure prevents food from entering the trachea during swallowing?
Inhalation occurs when the thoracic cavity volume ______ and pressure ______ compared to outside air.
During exhalation at rest, the diaphragm relaxes and moves upward.
Which features help alveoli exchange gases efficiently? (Select all that apply)
Oxygen moves from the alveoli into the blood mainly by...
What is the name of the tiny air sacs where gas exchange occurs?
Which statement best describes the role of hemoglobin in the blood?
Which change would most directly increase the rate of diffusion of oxygen from alveoli into blood?
Cilia and mucus in the trachea help trap and remove dust and microorganisms.
What happens to the ribs during inhalation when the external intercostal muscles contract?
Which statements about aerobic respiration are correct? (Select all that apply)
Where does most aerobic respiration occur in a human cell?
Name the gas that is produced as a waste product of aerobic respiration.
Why does breathing rate increase during exercise?
Which process is most directly responsible for moving oxygen from the lungs to body cells?
Which best explains why carbon dioxide diffuses from blood into the alveoli?
What is the main purpose of ventilation (breathing) in humans?
Which statement best distinguishes breathing (ventilation) from respiration?
Which product is formed in anaerobic respiration in yeast?
Anaerobic respiration releases less ATP per glucose molecule than aerobic respiration.
Which changes can increase ventilation rate during exercise? (Select all that apply)