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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
When you breathe quietly, inhalation is _______ and exhalation is _________.
- a. passive; passive
- b. active; active
- c. passive; active
- d. active; passive
Introduction: Breathing is also known as ventilation or respiration. The process of respiration facilitates the gas exchange with the internal environment by bringing in oxygen and flushing out carbon dioxide to the atmosphere. It is the process of moving air in and out of the lungs.
Reasons for the correct answer:
When an individual breathes quietly, the contraction of the diaphragm and intercostal muscles will increase the volume of the thoracic cavity. This reduces the pressure inside the alveoli, which is less than the atmospheric pressure, in order to move the air inward. During the exhalation process, the muscles relax and the thoracic cavity shrinks back. The air pressure inside the alveoli rises above the atmospheric pressure and the air moves out.
Option d. is given as “active; passive”. Inhalation is an active process and exhalation is a passive process in breathing. Therefore, option d. is correct.
Reasons for the incorrect answers:
Option a...
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