Shared Flashcard Set

Details

Physiology Respiratory Month 1 Week 2 Day 1
Physiology Respiratory Month 1 Week 2 Day 1
7
Physiology
Graduate
05/16/2018

Additional Physiology Flashcards

 


 

Cards

Term
gases in the air and their solubility in liquid/blood
Definition
nitrogen and oxygen are not that soluble but CO2 is (measure w ABG)
Term
respiratory membrane
Definition
where the capillaries from the pulmonary artery carrying deoxygenated blood come close to the alveoli
Term
what happens when we inhale
Definition
air pressure we take in goes down a bit in the conducting zone bc of the higher temp, oxygen levels go up in the alveoli so that oxygen moves into the capillaries to move from high to low and CO2 moves into the alveoli (CO2 in low in inspired air). this is called external respiration (then we exhale the CO2)
Term
barriers to alveolar diffusion
Definition
fluid- if there's not enough surfactant so a drop forms, the air would hit the drop and not have as much access to the surface of the alveolus
loss of alveolar surface area- emphezema (lose elastin that keep the alveoli open)
these barriers create physiological dead space (no gas exchange can occur, will reduce overall oxygenation of arterial blood)
Term
anatomic dead space
Definition
volume of respiratory organ that has air in it but is unable to undergo gas exchange- trachea, bronchi, bronchioles, nasal and oral cavities
Term
ventilation-perfusion matching
Definition
mechanism of the lungs that makes up for gravity's affect on perfusion (bloodflow) and ventilation (air movement) in lungs to make gas exchange as efficient as possible. arterioles in different areas of the low respond to low oxygen/decreased airflow w vasoconstriction and respond to high oxygen w vasodilation this shunts blood to regions where there is low oxygen. so perfusion is adjusted to changed in ventilation. bronchioles also respond by constricting when oxygen levels are high and dilating when low
Term
VQ mismatch
Definition
creates more physiological deadspace due to no bloodflow to a place with airflow/adequate ventilation. can occur due to pulmonary embolism, space w airflow is wasted bc blood can't get there. can also have shunting where bloodflow is normal or increased but air is obstructed from getting into the alveoli- ex lung infection like pneumonia, mucus and fluids are obstructing the airway but the infection itself could be causing inflammation which increases bloodflow, so inc bloodflow to area w inadequate perfusion-reduce overall output of lungs and reoxygenation of arterial blood
Supporting users have an ad free experience!