The Cardiac Cycle - QUIZ Flashcards
The cardiac cycle consists of a distinct relaxation and contraction phase. Which term is typically used to refer to ventricular contraction while no blood is being ejected?
a) Isovolumetric contraction
b) Diastole
c) Isotonic contraction
d) Systole
a) Isovolumetric contraction
Most blood enters the ventricle during:
a) Ventricular systole
b) Atrial diastole
c) Isovolumetric contraction
d) Atrial systole
b) Atrial diastole
Ventricular relaxation immediately follows:
a) Ventricular repolarization
b) Atrial depolarization
c) Atrial repolarization
d) Ventricular depolarization
a) Ventricular repolarization
The cardiovascular centers are located in which area of the brain?
a) Mesencephalon (midbrain)
b) Cerebrum
c) Medulla oblongata
d) Pons
c) Medulla oblongata
In the figure showing multiple curves, the red dashed curve represents a “normal” ventricular Frank-Starling curve. Which of the following statements is correct regarding curves A and B? Select all that apply.
a) Curve A represents a decrease in afterload or an increase in inotropy from normal
b) Curve B represents an increase in afterload or a decrease in inotropy from normal
c) The difference in the slopes of the curves is due to an increase or decrease in venous return
d) Curve B represents a decrease in afterload or an increase in inotropy from normal
e) Curve A represents an increase in afterload or a decrease in inotropy from normal
a) Curve A represents a decrease in afterload or an increase in inotropy from normal
b) Curve B represents an increase in afterload or a decrease in inotropy from normal
This diagram describes what process:
a) Cardiac Electrical Cycle
b) Pulmonary Mechanical Cycle
c) Cardiac Mechanical Loop
d) Cardiac Pressure Volume Loop
d) Cardiac Pressure Volume Loop
Identify the components of the cardiac pressure-volume loop. Match the items with the corresponding red number from the image.
a) Isovolumetric contraction
b) Ventricular ejection
c) Diastolic filling
d) Isovolumetric relaxation
a) 2
b) 3
c) 1
d) 4
Identify the components of the cardiac pressure-volume loop. Match the items in the left column below with the corresponding blue letter from the image.
a) Aortic valve opens
b) Mitral valve closes
c) Aortic valve closes
d) Mitral valve opens
a) C
b) B
c) D
d) A
Identify the components of the cardiac pressure-volume loop. Match the items with the corresponding GREEN letter from the image.
a) Systolic BP
b) Left ventricular end-diastolic pressure (LVEDP)
c) Diastolic BP
a) a
b) c
c) b
Identify the components of the cardiac pressure-volume loop. Match the items with the corresponding PURPLE characters (i, ii, iii) from the image.
a) End-diastolic volume
b) Stroke volume
c) End-systolic volume
a) ii
b) iii
c) i
Match the events that occur at each of the BLUE NUMBERED moments in the cardiac cycle.
a) Semilunar valves open
b) Semilunar valves close
c) AV valves open
d) AV valves close
a) 2
b) 3
c) 4
d) 1
In the figure, left ventricular stroke volume is plotted against left ventricular end-diastolic volume. Relative to the normal control point, which one of the following points represents the independent effects of a decrease in blood volume?
a) Point C
b) Point A
c) Point D
d) Point B
a) Point C
Compared to a normal left ventricular pressure-volume loop (grey), the red loop indicated by the arrow represents the independent effects of _________?
a) Decreased preload
b) Increased afterload
c) Increased inotropy
d) Increased preload
b) Increased afterload
