1. CARDIAC and RENAL: cardiac cycle Flashcards
Question 1 figure 19.6, 19.10, 19.9, 19.3
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to do: look at figs- heart
——-renal
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cardiac cycle- basic pressure rule
blood (and all liquids) move from high pressure to low pressure
systole means______. Usually this kind is referenced.
contraction, vnetricular
diastole =
relaxataion of all 4 chambers
2/3 of cardiac cycle is
diastole/relaxation
draw the cardiac cycle. how long does it take?
Numeral I card, 800 milliseconds or 8/10 of a second
What is the first step of the cardiac cycle?
atrial systole
Which atrium does the atrial systole?
both
What happens to volume in atrial systole? What happens to pressure? What is the resultant difference between atrial and ventricular pressure?
volume goes down, pressure goes up, so atr pressure is greater than vent pressure
In atrial systole, is the tricuspid valve open? is the bicuspid valve open? is the pulmonary semilunar v open? is the atrial semilunar v open?
bicuspid and tricuspid open, both semilunar valves closed
What is after atrial systole? What happens?
Ventricular systole I, ventricles contract, AV valves slam (LUB), ventr pressure rises rapidly
What happens after the valves slam and ventr pressure rises? Describe.
Ventricular systole II, ventricles ARE STILL contracting but now semilunar valves open, blood enters arteries, and
what happens after the AV valves close?
Ventricular distole II, ventricles relax, semilunar valves slam shut (DUB), verticular pressure rapidly drops
What happens after DUB?
ventricular pressure drops and Ventricular Diastole II starts: with relaxed ventricles and closed semilunars, the AV valves now open
