Learning goal 2: Select all of the options that best complete the following sentence. When we exhale:the diaphragm and intercostal muscles relaxthe lungs expandthe pressure in the lungs increases, forcing air outthe air has more carbon dioxide than inhaled air
Question
Learning goal 2: Select all of the options that best complete the following sentence. When we exhale:the diaphragm and intercostal muscles relaxthe lungs expandthe pressure in the lungs increases, forcing air outthe air has more carbon dioxide than inhaled air
Solution
When we exhale:
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The diaphragm and intercostal muscles relax: This is correct. During exhalation, the diaphragm and intercostal muscles relax, reducing the volume of the thoracic cavity and forcing air out of the lungs.
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The lungs expand: This is incorrect. During exhalation, the lungs actually contract, not expand. The expansion of the lungs occurs during inhalation when we take air in.
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The pressure in the lungs increases, forcing air out: This is correct. As the diaphragm and intercostal muscles relax, the volume of the lungs decreases, which increases the pressure inside the lungs. This increased pressure forces air out of the lungs.
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The air has more carbon dioxide than inhaled air: This is correct. The purpose of respiration is to exchange oxygen and carbon dioxide between our bodies and the environment. During inhalation, we take in oxygen-rich air. Our bodies use this oxygen and produce carbon dioxide as a waste product, which we then exhale. Therefore, exhaled air has a higher concentration of carbon dioxide compared to inhaled air.
Similar Questions
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Learning goal 2: Select all of the options that best complete the following sentence. When we exhale:
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