Respiratory System Flashcards
Mechanics of breathing
- Increased chest wall compliance
- Loss of Elastic Recoik
- Decreased Respiratory Muscle Mass and Strength
What is increased chest wall compliance in older?
Chest wall is stretched more during inhalation and less effort to expand the lungs
Elastic recoil is the ability of lungs to return to its unstressed state after inhalation, what happened if there is a loss lf elastic recoil?
Harder to empty the lungs
Decreased in muscles in diaphram and intercostal muscles results to?
Reduce efficiency and shallow breathing pattern
Imbalanced between “air” and “blood flow”
Increased ventilation
decreased cardiac output in lungs resulted to?
Less oxygen rich blood being deliverd to tissues and organs
What is decreased mixed venous oxygen
Oxygen content of blood returning to heart from tissues is decreased
What happens in increased physiologic dead space?
- More air in lungs that is not participating in the exchange or oxygen and carbon dioxide
- Larger portion of what you breathe is nit reaching the blood stream
What dies decreased alveolar surface area available for gas exchange?
Alevoli has less slace for oxygen and CO2 to move in and out
- Reduce lungs apability to transfer oxygen to blood stream
What happen if there is a reduce CO2 diffusion capacity?
- Lungs have hard time getting rid of CO2
- Led to decreased oxygenation and increased CO2 Levels in blood.
low oxygen
hypoxia
what is high CO2 levels in blood?
Hypercapnia
What does chemoreceptor do?
Sense chemical in body
What happens when there is decreased responsiveness of central and peripheral chemoreceptors to hypoxia and hypercapnia?
- When less sensitive brain will not recognized hypoxia and hypercapnia resulting to not sending signals to breath more or less
Give one lung defense mechanism
- Cilia (hair like or broom sweepers)
