When you hold your breath, which of the following changes in blood gas changes is the one that leads to the urge to breathe?

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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**Question:**

When you hold your breath, which of the following changes in blood gas changes is the one that leads to the urge to breathe?

- Rising O₂
- Falling O₂
- Falling CO₂
- Rising CO₂

**Explanation:**

This question is designed to test your understanding of respiratory physiology, specifically how changes in blood gas levels influence the urge to breathe. The choices provided indicate different scenarios involving oxygen (O₂) and carbon dioxide (CO₂) levels in the blood. The correct mechanism involves the increase of carbon dioxide levels, which is detected by chemoreceptors and signals the brain to trigger breathing. 

**Interactive Diagram:**

Explore the concept further with our interactive graph that illustrates how changes in O₂ and CO₂ levels affect the body's respiratory response. The graph highlights the threshold points where the urge to breathe is most likely initiated.
Transcribed Image Text:**Question:** When you hold your breath, which of the following changes in blood gas changes is the one that leads to the urge to breathe? - Rising O₂ - Falling O₂ - Falling CO₂ - Rising CO₂ **Explanation:** This question is designed to test your understanding of respiratory physiology, specifically how changes in blood gas levels influence the urge to breathe. The choices provided indicate different scenarios involving oxygen (O₂) and carbon dioxide (CO₂) levels in the blood. The correct mechanism involves the increase of carbon dioxide levels, which is detected by chemoreceptors and signals the brain to trigger breathing. **Interactive Diagram:** Explore the concept further with our interactive graph that illustrates how changes in O₂ and CO₂ levels affect the body's respiratory response. The graph highlights the threshold points where the urge to breathe is most likely initiated.
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