6058111
Description
Quiz by Chris Mulryan, updated more than 1 year ago
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Created by Chris Mulryan
over 8 years ago
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Question 1
Question
Angiotensin One has which one of the following effects on blood vessels?
Answer
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Produces vasoconstriction
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Reduces permeability
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Increases permeability
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Angiotensin one is an inactive precursor chemical
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Produces vasodilatation
Question 2
Question
Papillary muscles serve which one of the following functions in the heart?
Answer
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Direct blood flow towards the out flow tract during systole
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Assist in keeping the lower pressured vessels patent in the heart by aposing the affect of the higher pressed atrial supply
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Assist with expansion of the heart following systole
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Anchor the chordae tendineae and assist in keeping the atrio ventricular valves closed during ventricular systole
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Anchor the chordae tendineae and assist in keeping the aortic and pulmonary valves closed during ventricular systole
Question 3
Question
Which one of the following describes the components needed for effective perfusion?
Answer
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Cardiac pump, cardiac output, heart rate
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Cardiac pump and extra vascular muscle pump
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Stroke volume x heart rate
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Vascular resistance & blood volume
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Cardiac pump, blood volume, systemic vascular resistance
Question 4
Question
With regard to the SA node, which one of following is true?
Answer
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It is made of cardiac myocytes
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It has automaticity at a rate of 200 beats per min
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In health it is the only electrical connection between the atria and the ventricles
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It is the natural pace maker of the heart
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It is the escape pacemaker of the heart
Question 5
Question
Which one of the following coronary vessels supplies the anterior wall of the heart?
Answer
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The circumflex
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The left intraventrcular
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Right coronary artery
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Left main coronary artery
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The coronary sinus
Question 6
Question
Which one of the following best describes the coronary ostia?
Answer
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Is the physiological narrowing in the coronary vessel that ensures a low pressure distal to the ostia so that coronary flow is maintained
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The coronary ostia is the opening to the right atrium off the vena cava
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It is the opening in the aorta which supplies oxygenated blood to the coronary vessels
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It is the point in the coronary circulation where the left coronary artery divides into the left anterior descending and the circumflex artery
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It is the connection between the arterial and venous systems in the coronary vasculature
Question 7
Question
The aortic valve is designed to prevent flow of blood in which one of the following situations?
Answer
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From the right atrium into the vena cava during diastole
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The from the left ventricle into the left atrium during systole
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From the right atrium into the vena cava during systole
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From the aorta into the left ventricle during diastole
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From the right ventricle into the right atrium during systole
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