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Oxygen molecules (O2) move from the lungs into the bloodstream, while carbon dioxide (CO,) molecules move from the bloodstream to the lungs (see Figure 3-2). Use these terms: diffusion, higher, hypertonic, hypotonic, lower Movement of O, and CO2 across the membrane occurs by In this figure, 0, is moving from the to the because the concentration of O, in the alveolus is while that in the capillary is

Oxygen molecules (O2) move from the lungs into the bloodstream, while carbon dioxide (CO,) molecules move from the bloodstream to the lungs (see Figure 3-2). Use these terms: diffusion, higher, hypertonic, hypotonic, lower Movement of O, and CO2 across the membrane occurs by In this figure, 0, is moving from the to the because the concentration of O, in the alveolus is while that in the capillary is

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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### Oxygen and Carbon Dioxide Movement Between Lungs and Bloodstream **Oxygen molecules (O₂)** move from the lungs into the bloodstream, while **carbon dioxide (CO₂)** molecules move from the bloodstream to the lungs (see Figure 3-2). Use these terms: diffusion, higher, hypertonic, hypotonic, lower 1. Movement of O₂ and CO₂ across the membrane occurs by ________________. 2. In this figure, O₂ is moving from the ________________ to the ________________ because the concentration of O₂ in the alveolus is ________________, while that in the capillary is ________________. #### Figure 3-2: Movement of Oxygen Molecules The figure illustrates the movement of oxygen molecules (O₂) and carbon dioxide molecules (CO₂) between an alveolus in the lungs and a capillary. - **Alveolus**: Represented as a sac-like structure labeled with "100 units O₂". - **Blood Flow**: Arrows indicate the direction of blood flow along the capillary surrounding the alveolus. - **Oxygen Movement**: O₂ is shown moving from the alveolus into the capillary. - **Carbon Dioxide Movement**: CO₂ is depicted moving from the capillary into the alveolus. - **Capillary**: Labeled with "40 units O₂", indicating the concentration of oxygen in the bloodstream. This figure demonstrates the process of gas exchange where oxygen moves from a region of higher concentration (the alveolus) to a region of lower concentration (the capillary), while carbon dioxide follows the opposite path.
Transcribed Image Text:### Oxygen and Carbon Dioxide Movement Between Lungs and Bloodstream **Oxygen molecules (O₂)** move from the lungs into the bloodstream, while **carbon dioxide (CO₂)** molecules move from the bloodstream to the lungs (see Figure 3-2). Use these terms: diffusion, higher, hypertonic, hypotonic, lower 1. Movement of O₂ and CO₂ across the membrane occurs by ________________. 2. In this figure, O₂ is moving from the ________________ to the ________________ because the concentration of O₂ in the alveolus is ________________, while that in the capillary is ________________. #### Figure 3-2: Movement of Oxygen Molecules The figure illustrates the movement of oxygen molecules (O₂) and carbon dioxide molecules (CO₂) between an alveolus in the lungs and a capillary. - **Alveolus**: Represented as a sac-like structure labeled with "100 units O₂". - **Blood Flow**: Arrows indicate the direction of blood flow along the capillary surrounding the alveolus. - **Oxygen Movement**: O₂ is shown moving from the alveolus into the capillary. - **Carbon Dioxide Movement**: CO₂ is depicted moving from the capillary into the alveolus. - **Capillary**: Labeled with "40 units O₂", indicating the concentration of oxygen in the bloodstream. This figure demonstrates the process of gas exchange where oxygen moves from a region of higher concentration (the alveolus) to a region of lower concentration (the capillary), while carbon dioxide follows the opposite path.
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