Figure 39.13Which of the following statements is false? -Pco2 0.2 mm Hg -Po2 160 mm Hg Ambient air Deoxygenated veins, · upper torso -Oxygenated arteries, upper torso Capillaries Pcoz 46 mm Hg. -Pco2 40 mm Hg Poz 40 mm Hg. -Po2 100 mm Hg Venous blood Arterial blood Deoxygenated veins, - lower torso Oxygenated arteries, lower torso Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. In the tissues, Po, drops as blood passes from the arteries to the veins, while Pco, increases. a b Blood travels from the lungs to the heart to body tissues, then back to the heart, then the lungs. Blood travels from the lungs to the heart to body tissues, then back to the lungs, then the heart. Po, is higher in air than in the lungs.

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**Educational Content for Respiratory and Circulatory Systems**

**Title: Understanding Gas Exchange in Human Physiology**

**Figure 39.13: Which of the following statements is false?**

The diagram illustrates the human respiratory and circulatory systems, highlighting the exchange of gases, specifically oxygen (O₂) and carbon dioxide (CO₂), in different parts of the body.

**Diagram Explanation:**

- The diagram shows the human torso with major blood vessels and the heart. It highlights the paths of oxygenated and deoxygenated blood.
- **Key Points of Gas Partial Pressures:**
  - **Ambient Air:**
    - \( P_{\text{CO}_2} \) = 0.2 mm Hg
    - \( P_{\text{O}_2} \) = 160 mm Hg
  - **Arterial Blood:**
    - \( P_{\text{CO}_2} \) = 40 mm Hg
    - \( P_{\text{O}_2} \) = 100 mm Hg
  - **Venous Blood:**
    - \( P_{\text{CO}_2} \) = 46 mm Hg
    - \( P_{\text{O}_2} \) = 40 mm Hg
  - **Labels include:**
    - Deoxygenated veins (upper and lower torso)
    - Oxygenated arteries (upper and lower torso)
    - Capillaries

**Options for Analysis:**

a) In the tissues, \( P_{\text{O}_2} \) drops as blood passes from the arteries to the veins, while \( P_{\text{CO}_2} \) increases.

b) Blood travels from the lungs to the heart to body tissues, then back to the heart, then the lungs.

c) Blood travels from the lungs to the heart to body tissues, then back to the lungs, then the heart.

d) \( P_{\text{O}_2} \) is higher in air than in the lungs.

**Correct Answer:**

The false statement here is **c**, as the accurate pathway is: blood travels from the lungs to the heart to body tissues, then back to the heart and then the lungs (as described in option b).

Understanding these basic principles of human physiology is essential for comprehending how respiratory and circulatory systems function in tandem to maintain homeostasis.
Transcribed Image Text:**Educational Content for Respiratory and Circulatory Systems** **Title: Understanding Gas Exchange in Human Physiology** **Figure 39.13: Which of the following statements is false?** The diagram illustrates the human respiratory and circulatory systems, highlighting the exchange of gases, specifically oxygen (O₂) and carbon dioxide (CO₂), in different parts of the body. **Diagram Explanation:** - The diagram shows the human torso with major blood vessels and the heart. It highlights the paths of oxygenated and deoxygenated blood. - **Key Points of Gas Partial Pressures:** - **Ambient Air:** - \( P_{\text{CO}_2} \) = 0.2 mm Hg - \( P_{\text{O}_2} \) = 160 mm Hg - **Arterial Blood:** - \( P_{\text{CO}_2} \) = 40 mm Hg - \( P_{\text{O}_2} \) = 100 mm Hg - **Venous Blood:** - \( P_{\text{CO}_2} \) = 46 mm Hg - \( P_{\text{O}_2} \) = 40 mm Hg - **Labels include:** - Deoxygenated veins (upper and lower torso) - Oxygenated arteries (upper and lower torso) - Capillaries **Options for Analysis:** a) In the tissues, \( P_{\text{O}_2} \) drops as blood passes from the arteries to the veins, while \( P_{\text{CO}_2} \) increases. b) Blood travels from the lungs to the heart to body tissues, then back to the heart, then the lungs. c) Blood travels from the lungs to the heart to body tissues, then back to the lungs, then the heart. d) \( P_{\text{O}_2} \) is higher in air than in the lungs. **Correct Answer:** The false statement here is **c**, as the accurate pathway is: blood travels from the lungs to the heart to body tissues, then back to the heart and then the lungs (as described in option b). Understanding these basic principles of human physiology is essential for comprehending how respiratory and circulatory systems function in tandem to maintain homeostasis.
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