Lecture 7- Mechanical events of the cardiac cycle Flashcards
1st heart sound is closure of …
AV valves
2nd heart sound is closure of…
aor/pulm valves
(series or parallel?)
systemic and pulmonary circulations are in….
organs in systemic circulation are in ….
series
parallel
Series- ALL blood going back to the heart will be….
Parallel- EACH organ will be perfused with…
Deoxygenated
fully oxygenated blood
During systole the ventricles are…
contracting
During diastole the ventricles are…
relaxing
everything is the same on R and L side of heart (heartbeat, volume) EXCEPT…
pressure generated
CO=
HR x SV
The … is the volume of blood each ventricle pumps per minute or the volume of blood flowing thru either the systemic or pulmonary circuit per minute
cardiac output
The … system slows down HR, the … system speeds it up
parasympathetic
sympathetic
The parasympathetic system can only regulate… because it only has receptors in the atria
HR
The sympathetic system has beta receptors on the atria which will regulate…. and beta receptors on the ventricles that will regulate …
HR
SV
change … channels to speed or slow down HR
Na “funny” channels
increasing activity of sympathetic nerves to heart means opening of … channels, the opposite of PS
more funny
ways to influence SV
- preload/EDV
- sympathetic input to ventricle
- afterload (dont worry about this)
