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
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To determine if each statement is true or false and explain why, you can use your knowledge of the respiratory system.
1. The sole activity of the respiratory system is breathing.
- False. While breathing is a primary function of the respiratory system, it also includes other activities such as gas exchange and the regulation of pH levels in the body.
2. The exchange of gases between the blood and tissue cells is external respiration.
- False. External respiration refers to the exchange of gases between the lungs and the blood. The exchange of gases between the blood and tissue cells is known as internal respiration.
3. Air flows in the process of pulmonary ventilation because of pressure differences between the atmosphere and the gases inside the lungs.
- True. Pulmonary ventilation is the process of air moving into and out of the lungs. This movement is driven by pressure differences between the atmosphere and the gases inside the lungs.
4. Intrapleural pressure is the pressure inside the alveoli of the lungs while intraalveolar pressure is the pressure within the pleural cavity.
- False. Intrapleural pressure refers to the pressure within the pleural cavity, which is the space between the two layers of pleura that surround the lungs. Intraalveolar pressure, also known as intrapulmonary pressure, is the pressure within the alveoli of the lungs.
5. The amount of air that is exchanged during one cycle varies with age, sex, size, and physical condition.
- True. The amount of air exchanged during one breathing cycle, known as tidal volume, can vary depending on factors such as age, sex, size, and physical condition.
6. External nares are two openings through which air enters the nasal cavity from the outside.
- True. External nares, also called nostrils, are the two openings at the front of the nose through which air enters the nasal cavity from the external environment.
7. Nasal cavities are air spaces within the skull.
- True. Nasal cavities are hollow spaces located within the skull that are lined with mucous membranes. They help warm, filter, and humidify incoming air before it reaches the lungs.
8. The upper part of the pharynx lets only air pass through. Lower parts permit air, foods, and fluids to pass.
- False. The pharynx, commonly known as the throat, is divided into three parts - the nasopharynx, oropharynx, and laryngopharynx. While the nasopharynx allows only air to pass through, the oropharynx and the laryngopharynx allow both air and food/fluids to pass.
9. The pharynx plays an essential role in human speech.
- True. The pharynx, together with other structures such as the tongue, lips, and vocal cords, plays a crucial role in producing speech sounds. It acts as a resonating chamber and modifies the sound produced by the vocal cords, contributing to speech articulation.
10. 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. The right lung and the left lung are not symmetrical in size. The right lung is divided into three lobes (upper, middle, and lower lobes), while the left lung has only two lobes (upper and lower lobes). This asymmetry is due to the placement of other organs within the thoracic cavity.