Oxygen consumption and VO2 max — Flashcards

Flashcard 1: In response to exercise, the V/Q ratio from apex to base becomes more _____ (even or uneven)

Answer: even

Flashcard 2: In response to exercise, there is _____ venous CO2 content

Answer: increased

Flashcard 3: In exercise, O2 exhibits _____-limited gas exchange

Answer: perfusion

Extra: O2 is perfusion-limited in both resting and exercise states in healthy individuals at sea level. It becomes diffusion-limited in conditions like pulmonary fibrosis or during exercise at high altitude where the partial pressure gradient is reduced.

Flashcard 4: What is the effect of increased ventricular diameter on cardiac O2 consumption? _____

Answer: Increased O2 consumption

Flashcard 5: In response to exercise, there is _____ venous O2 content

Answer: decreased

Flashcard 6: Which phase of the cardiac cycle is the period of highest O2 consumption? _____

Answer: Isovolumetric contraction

Flashcard 7: In exercise, blood flows faster through the pulmonary capillaries, resulting in it taking a _____ time for capillary O2 concentration to maximize (shorter or longer)?

Answer: longer

Flashcard 8: The maximum volume of gas that can be expired after maximal inspiration is known as the _____

Answer: (forced) vital capacity

Flashcard 9: How does Paco2 change in response to exercise?_____

Answer: No change

Flashcard 10: What kind of nerves carry inputs to the cerebellum?

Answer: climbing and mossy fibers