Physiology Flashcards
1
Q
Mechanism by which sympathetic activation increases SA node firing rate
A
Sharper slope of phase 4 for more rapid depolarization
2
Q
Chronotropy=?
Inotropy=?
A
Chronotropy=HR
Inotropy=contractility
3
Q
What are the three ways that CO2 is transported in the blood? Which is primary?
A
As bicarbonate (primary)
Carbamino compounds
Dissolved
4
Q
Rate of O2 consumption in an adult
A
3-4cc/kg/min
5
Q
Average FRC in an adult
A
30cc/kg
6
Q
Equation for calculating minutes until hypoxemia
A
(FRC/O2 consumption)* %O2 in FRC
7
Q
Formula for calculating arterial oxygen content (CaO2)
A
CaO2 = [SaO2(1.34 x hgb)]+ 0.003 x PaO2
8
Q
Effects of muscarinic agonism
A
Bradycardia Bronchoconstriction Miosis Secretions GI hypermotility
