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HMS Homeostasis I > Exercise physiology > Flashcards

Flashcards in Exercise physiology Deck (9)
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1
Q

Crackles are essentially . . .

A

. . . the sound made by a sudden equilibriation of pressure between a collapsed alveolus and incoming air from a bronchiole. The sound of alveoli popping open.

2
Q

Conditions that affect alveolar stability

A
  1. Things that affect surfactant function, like infection
  2. Things that affect elastic recoil, like scarring

All together, these have in common: greater recoil force, that gives a smaller radius, leading to a greater pressure (Laplace’s law)

3
Q

Crackles are heard on ___.

A

Crackles are heard on inspiration.

4
Q

JVP and ECG correlates

A
5
Q

When would you see a really big v wave on JVP?

A

When you have tricuspid regurgitation

6
Q

Oxygen delivery and return equations

A

Delivery = CaO2 x CO

Return = CvO2 x CO

CO = cardiac output

C = total content (arterial vs venous)

7
Q

Oxygen consumption

A

Constumption = CO ( CaO2 - CvO2 )

8
Q

If CO goes down, consequently, in order to meet metabolic demands, the body must ___.

A

If CO goes down, consequently, in order to meet metabolic demands, the body must extract more oxygen per unit volume of blood.

This means CvO2 will go down as well.

9
Q

When you do exercise training, . . .

A

. . . cardiac output goes up and our ability to extract oxygen goes up because there are more mitochondria and a greater capillary density.