Gas exchange — Flashcards

Flashcard 1: What is the secondary regulator of cerebral perfusion?

Answer: PO2 - only takes effect during severe hypoxia

Flashcard 2: What is the primary regulator of cerebral perfusion?

Answer: PCO2

Flashcard 3: How long can the brain withstand hypoxia before sustaining irreversible damage?

Answer: 5 minutes

Flashcard 4: Which zone of the lung has the highest Pao2? _____

Answer: Zone 1

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=14] https://onlinemeded.org?ref=anki 

Flashcard 5: In the _____, HCO3- enters the red blood cells in exchange for Cl-

Answer: lungs

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=12] https://onlinemeded.org?ref=anki 

Flashcard 6: COPD, cyanotic congenital heart disease, obstructive sleep apnea, and high altitude cause _____ polycythemia

Answer: physiologic secondary

Extra:  * due to chronic hypoxia Watch Polycythemia [https://dashboard.sketchy.com/study/medical/courses/medical-pathophysiology/units/medical-pathophysiology-myeloid-lymphoid/videos/medical-pathophysiology-myeloid-and-lymphoid-myeloid-disorders-polycythemia?utm_source=anki&utm_medium=partnership&utm_campaign=february_update&utm_content=medical] https://onlinemeded.org?ref=anki 

Flashcard 7: Is the A - a gradient normal, increased, or decreased, in response to right-to-left shunts? _____

Answer: Increased

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=26] https://onlinemeded.org?ref=anki 

Flashcard 8: _____ in 2,3-BPG cause the O2-hemoglobin dissociation curve to shift to the left

Answer: Decreases

Extra:   https://onlinemeded.org/spa/heme-onc/hemoglobin/acquire?ref=anki 

Flashcard 9: The partial pressure of oxygen in the venous blood (PvO2) is normally approximately _____ mmHg

Answer: 40

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=14] https://onlinemeded.org/spa/pulmonary/gas-exchange/acquire?ref=anki 

Flashcard 10: Gas emboli occur due to bubbling of _____ out of blood, due to rapid ascent by a diver

Answer: nitrogen gas

Extra:   https://onlinemeded.org/spa/pulmonology/pulmonary-embolism/acquire?ref=anki