Question

In: Anatomy and Physiology

Describe how gravity alters ventilation and especially perfusion in the lungs.

Describe how gravity alters ventilation and especially perfusion in the lungs.

Solutions

Expert Solution

Total ventilation is a product of regional ventilation and alveolar regional volume.

Both measurements therefore have a direct relationship with lung volume.

  • In the left lateral position the dependent lung has smaller volume than than in the right lateral position.
  • And the magnitudes of the vertical gradients of blood flow and ventilation are less.

relatively small variation in blood flow and ventilation with gravity does no compensate for the greater loss of lung volume in this position.

Thus total blood flow and alveolar ventilation in the dependent lung is less than the non-dependent lung In The left lateral position.

BECAUSE THE DECREASE IN LUNG volume outweigh ANY GRAVITY DEPENDENT increase in VENTILATION AND PERFUSION.

Sydney Mullin answered 2 years ago
Next > < Previous

Related Solutions

Through mechanisms of ventilation-perfusion coupling, an increase in air flow to the lungs will drive a...
Through mechanisms of ventilation-perfusion coupling, an increase in air flow to the lungs will drive a decrease in blood flow to the lungs. True False
Compare blood flow (perfusion) and air/water flow (ventilation) in fish gills, frog lungs, bird lungs and...
Compare blood flow (perfusion) and air/water flow (ventilation) in fish gills, frog lungs, bird lungs and mammalian lungs. Consider how terms of the Fick Diffusion Equation (write out) are manifest in the design of the exchange surfaces.
2) What are ventilation and perfusion? Briefly explain how the process of ventilation-perfusion coupling is achieved
2) What are ventilation and perfusion? Briefly explain how the process of ventilation-perfusion coupling is achieved 3) Briefly describe the steps of normal quiet inspiration and expiration. 
Describe the physical properties of the lungs and how they relate to ventilation. Be sure to...
Describe the physical properties of the lungs and how they relate to ventilation. Be sure to explain what elasticity and compliance and relate these physical lung properties to specific aspects of ventilation. Explain they are important
Describe the physical properties of the lungs and how they relate to ventilation. Be sure to...
Describe the physical properties of the lungs and how they relate to ventilation. Be sure to explain what elasticity and compliance and relate these physical lung properties to specific aspects of ventilation. Explain they are important.
Ventilation VS Perfusion
Ventilation VS Perfusion(A) Present a brief discussion of how asthma is diagnosed(B) Present a brief discussion of the difference between bronchitis and pneumonia(C) Present a brief discussion of the mechanisms of ventilation versus perfusion(D) Present a brief discussion of the role of the thoracic cage and associated musculature in breathing
paragraph description of the ventilation without perfusion and 1 for perfusion without ventilation. What is occuring...
paragraph description of the ventilation without perfusion and 1 for perfusion without ventilation. What is occuring in deatils
Describe ventilation-perfusion matching in the lung. How might mismatch lead to hypoxemia? physiology
Describe ventilation-perfusion matching in the lung. How might mismatch lead to hypoxemia? physiology
Describe the pathophysiology of COPD and explain how it can progress to lung hypertension, causing ventilation-perfusion...
Describe the pathophysiology of COPD and explain how it can progress to lung hypertension, causing ventilation-perfusion mismatch
what is ventilation/perfusion mis-matching?
what is ventilation/perfusion mis-matching?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT