The sole activity of the respiratory system is breathing.
True False
The exchange of gases between the blood and tissue cells is external respiration.
True False
Air flows in the process of pulmonary ventilation because of pressure differences between the atmosphere and the gases inside the lungs.
True False
Intrapleural pressure is the pressure inside the alveoli of the lungs while intraalveolar pressure is the pressure within the pleural cavity.
True False
The amount of air that is exchanged during one cycle varies with age, sex, size, and physical condition.
True False
External nares are two openings through which air enters the nasal cavity from the outside.
True False
Nasal cavities are air spaces within the skull.
True False
The upper part of the pharynx lets only air pass through. Lower parts permit air, foods, and fluids to pass.
True False
The pharynx plays an essential role in human speech.
True False
The right lung and the left lung are the same in size. However, the right lung has three lobes while the left lung has two lobes.
True False
How would you like us to help you with this quiz/test?
True
The sole activity of the respiratory system is breathing.
- False
Explanation: While breathing is a major function of the respiratory system, it also serves other important functions such as gas exchange, regulation of blood pH, and olfaction (sense of smell).
The exchange of gases between the blood and tissue cells is external respiration.
- False
Explanation: The exchange of gases between the blood and tissue cells is actually internal respiration. External respiration refers to the exchange of gases between the lungs and blood.
Air flows in the process of pulmonary ventilation because of pressure differences between the atmosphere and the gases inside the lungs.
- True
Explanation: Air flows into and out of the lungs during pulmonary ventilation due to pressure differences. Specifically, during inhalation, the diaphragm and intercostal muscles contract, increasing the volume of the thoracic cavity and lowering the pressure inside the lungs. This causes air to flow in and fill the lungs. During exhalation, the muscles relax and the lungs recoil, decreasing the volume and increasing the pressure, which forces air out of the lungs.
Intrapleural pressure is the pressure inside the alveoli of the lungs while intraalveolar pressure is the pressure within the pleural cavity.
- False
Explanation: Intrapleural pressure is the pressure within the pleural cavity, which is the space between the lungs and the inner chest wall. Intraalveolar pressure refers to the pressure inside the alveoli of the lungs, which is the small air sacs where the gas exchange occurs.
The amount of air that is exchanged during one cycle varies with age, sex, size, and physical condition.
- True
Explanation: The amount of air exchanged during one respiratory cycle, also known as the tidal volume, can vary based on factors such as age, sex, size, and physical condition. For example, larger individuals generally have a higher tidal volume due to their larger lung capacity.
External nares are two openings through which air enters the nasal cavity from the outside.
- True
Explanation: External nares, also known as nostrils, are the two openings through which air enters the nasal cavity from the outside. The air then passes through the nasal cavities, where it is filtered, moistened, and warmed before reaching the lungs.
Nasal cavities are air spaces within the skull.
- True
Explanation: The nasal cavities are indeed air spaces within the skull. They are located behind the external nares and are lined with specialized respiratory epithelium that helps in conditioning the inhaled air.
The upper part of the pharynx lets only air pass through. Lower parts permit air, foods, and fluids to pass.
- True
Explanation: The pharynx is divided into three regions: the nasopharynx, oropharynx, and laryngopharynx. The upper part of the pharynx, specifically the nasopharynx, serves as a passageway for air only. The lower parts, the oropharynx and laryngopharynx, allow the passage of both air and food.
The pharynx plays an essential role in human speech.
- True
Explanation: The pharynx plays a crucial role in human speech production. It serves as a resonating chamber, modifying sounds produced by the vocal cords and surrounding structures to produce speech.
The right lung and the left lung are the same in size. However, the right lung has three lobes while the left lung has two lobes.
- False
Explanation: The right lung and the left lung are not exactly the same in size. The right lung is larger and has three lobes (upper, middle, and lower lobes), while the left lung is smaller and has two lobes (upper and lower lobes). This size and lobe difference is due to the space occupied by the heart, which is positioned more towards the left side of the chest.
True
true
true
false
false
true
false
true