Podcast
Questions and Answers
What happens when ventilation exceeds perfusion in the lungs?
What happens when ventilation exceeds perfusion in the lungs?
- Enhanced gas exchange efficiency
- Increased physiological dead space (correct)
- Improved lung compliance
- Decreased physiological dead space
Why does physiological dead space occur?
Why does physiological dead space occur?
- Due to excessive perfusion
- Due to equal ventilation and perfusion
- Due to balanced ventilation and perfusion
- Due to deficient perfusion (correct)
Which of the following scenarios would likely reduce physiological dead space?
Which of the following scenarios would likely reduce physiological dead space?
- Increased ventilation and increased perfusion
- Increased ventilation and decreased perfusion
- Decreased ventilation and decreased perfusion
- Decreased ventilation and increased perfusion (correct)
What is the consequence of an imbalance where ventilation is less than perfusion?
What is the consequence of an imbalance where ventilation is less than perfusion?
How does physiological dead space affect gas exchange in the lungs?
How does physiological dead space affect gas exchange in the lungs?
What is the main focus of the Applied Physiology course 2 Lecture 18, 19, and 20?
What is the main focus of the Applied Physiology course 2 Lecture 18, 19, and 20?
Who is the intended audience for the Applied Physiology course 2 Lecture 18, 19, and 20?
Who is the intended audience for the Applied Physiology course 2 Lecture 18, 19, and 20?
Which department is responsible for the Applied Physiology course 2 Lecture 18, 19, and 20?
Which department is responsible for the Applied Physiology course 2 Lecture 18, 19, and 20?
Who is the lecturer for the Applied Physiology course 2 Lecture 18, 19, and 20?
Who is the lecturer for the Applied Physiology course 2 Lecture 18, 19, and 20?
What is the primary topic of the lecture series?
What is the primary topic of the lecture series?
What is the primary cause of a pulmonary physiological shunt?
What is the primary cause of a pulmonary physiological shunt?
Which V/Q ratio is associated with a pulmonary physiological shunt?
Which V/Q ratio is associated with a pulmonary physiological shunt?
What effect does a pulmonary physiological shunt have on the V/Q ratio?
What effect does a pulmonary physiological shunt have on the V/Q ratio?
Which of the following best describes the cause of a pulmonary physiological shunt?
Which of the following best describes the cause of a pulmonary physiological shunt?
What is the relationship between ventilation and perfusion in a pulmonary physiological shunt?
What is the relationship between ventilation and perfusion in a pulmonary physiological shunt?
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Study Notes
Physiological Dead Space and Pulmonary Physiological Shunt
- Physiological dead space occurs when ventilation exceeds perfusion due to deficient perfusion.
- Pulmonary physiological shunt is caused by a zero or low V/Q ratio, resulting from insufficient ventilation and excess perfusion.
- Deficient perfusion leads to physiological dead space, whereas excess perfusion contributes to pulmonary physiological shunt.
- Both concepts are crucial in understanding the respiratory system, specifically in the context of ventilation-perfusion ratio (V/Q ratio).
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