Cardiac Cycle

Flaps of tissue that prevents blood from flowing backward into the left atrium check all the correct answers

• bicuspid valve

• tricuspid valve

• semilunar valve

• left atrioventricular valve

Normal blood pressure is...

• 120/80 mmHg
• 80/120 mmHg
• 140/90 mmHg
• 80/140 mmHg

The 'Lub' sound of the heart's LUB DUB? are the....

• Atrioventricular valves closing
• Semilunar Valves closing
• Blood flowing through the Pulmonary Trunk and Aorta
• Blood Flowing down into the venticles

The 'Dub' sound of the heart's LUB DUB? are the....

• Atrioventricular valves closing
• Semilunar Valves closing
• Blood flowing through the Pulmonary Trunk and Aorta
• Blood Flowing down into the venticles

A complete cardiac cycle takes place for about

• 8 seconds

• 0.8 second

• 0.3 second

• 0.4 second

If there is higher pressure in the aorta than in the left ventricle, there will be no movement of blood out of the ventricle

• True

• False

Which of the following is true about the semi-lunar valves in the heart?

• They are between atria and ventricles

• They close when pressure in the arteries is higher than pressure in the atria

• They prevent backflow of blood into the atria

• They open when pressure in the ventricles is higher than pressure in the arteries

During ventricular systole, which of the following occurs?

• Atrioventricular valves close and semilunar valves close

• Atrioventricular valves close and semilunar valves open

• Atrioventricular valves open and semilunar valves are open

• Atrioventricular valves open and semilunar valves close

The graph shows pressure changes in the left atrium, left ventricle and aorta during a cardiac cycle.

What is happening at point D on the graph?

• semilunar valves open

• semilunar valves close

• atrioventricular valves open

• atrioventricular valves close

The graph shows pressure changes in the left atrium, left ventricle and aorta during a cardiac cycle.

What would the curve look like for the right ventricle, if placed on this graph?

• same pattern but to the right of the left ventricle curve

• different pattern and to the right of the left ventricle curve

• same pattern but lower than the left ventricle curve

• different pattern and lower than the left ventricle curve