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WorksheetsMD 3 MINI QUIZ
Total questions: 18
Worksheet time: 10mins
What is the primary role of the sinoatrial (SA) node in the heart?
To delay electrical signals before they reaches the ventricles
To regulate the heart rate by initiating electrical impulses
To pump blood to the lungs
to control the contraction of the ventricles
If heart rate increases, what happens to cardiac output (assuming stroke volume remains constant)?
Cardiac output remains unchanged
Cardiac output increases
Cardiac output decreases
Cardiac output fluctuates
Liver congestion is a sign related to left-side congestive heart failure.
True
False
What is the function of the coronary arteries?
To remove carbon dioxide from the heart
To carry deoxygenated blood to the right atrium
To supply oxygenated blood to the heart muscle
To transport oxygenated blood to the lungs
Which of the following would increase Cardiac Output?
Decreased preload
Decreased ESV
Decreased contractility
Decreased afterload
Which of the following best describes the relationship between stroke volume and preload?
Preload does not affect stroke volume
As preload increases, stroke volume increases
As preload increases, stroke volume decreases
Stroke volume is independent of preload
The ______________ creates a delay to _________________
(a)
Cardiac output can be increased by all the following, except ____________________.
increasing stroke volume
exercise
increasing EDV
increasing ESV
If the heart preload decreases, the stroke volume will ___________.
increase
decrease
stop
stay constant
A decrease in End-Systolic Volume (ESV) would most likely lead to:
No change in cardiac output
A decrease in stroke volume
A decrease in heart rate
An increase in stroke volume
An increase in End-Diastolic Volume (EDV) leads to an increase in stroke volume because of which phenomenon?
The Frank-Starling mechanism
Increased heart rate
Decreased contractility
Increased sympathetic nervous activity
is the volume of blood that is pumped out of the heart during each heartbeat
afterload
heart rate
cardiac output
stroke volume
What does the P-wave on an ECG represent?
Ventricular repolarization
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Which of the following would most likely increase stroke volume?
Increased heart rate
Increased myocardial contractility
Decreased venous return
Increased afterload
During ventricular ejection, the ________________.
AV valves are closed
blood is entering the ventricles
pressure in the atria remains constant
atria are contracting
What is the correct order of the phases of the cardiac cycle?
atrial contraction, ventricular contraction, isovolumetric ventricular contraction, passive ventricular filling, isovolumetric ventricular relaxation
passive ventricular filling, isovolumetric ventricular relaxation, ventricular contraction, isovolumetric ventricular contraction, atrial contraction
passive ventricular filling, ventricular contraction, isovolumetric ventricular contraction, isovolumetric ventricular relaxation, atrial contraction
atrial contraction, isovolumetric ventricular contraction, ventricular contraction, isovolumetric ventricular relaxation, passive ventricular filling
The interatrial septum is thicker than the interventricular septum.
True
False
What happens to the volume of blood in the ventricles during the isovolumetric ventricular contraction phase (of the cardiac cycle)?
The volume of blood decreases.
The volume of blood increases.
The volume of blood does not change.
