Chapter 13: Heart

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The ventricles and and Atria can be in systole at the same time?

False

A single cardiac cycle usually takes about 2 seconds true or false

False .8 seconds

The AV valves and semilunar valves are open at the same time true or false

False when the AV valves are open, semilunar valves are closed: when semilunar valves are open AV valves are closed

Left atrium leads to

Bicuspid or mitral valve

What state are the ventricles in when the AV valves are open?

Ventricular diastole

When do the semilunar valves open?

When pressure in the ventricles is greater than that in the arteries

At the beginning of ventricular diastole what position are the AV valves in?

AV valves are closed

What is the position of the valves during ventricular filling?

AV valves are open; semilunar valves are closed

The period of contraction is called systole true or false

True

Aortic valve leads to

Aorta

Left ventricle leads to

Aortic valve

In the cardiovascular system what vessels are the site of nutrient, gas and waste Exchange?

Capillaries

What is it called when the AV valves open, causing ventricular filling, making ventricular systole begin, with ventricular pressure rising, causing AV valves to close, semilunar valves open, ejection of blood, ventricular systole begins, semilunar valves close, and ventricular pressure Falls?

Cardiac cycle in order

Pulmonary vein leads to

Left atrium

Bicuspid or mitral valve leads to

Left ventricle

Pulmonary artery leads to

Lungs

What is the function of the chordae tendineae?

Prevent the cusps of the AV valves from opening back into the atrium

Left atrioventricular valve and bicuspid valve

Prevents backflow of blood to the left atrium

Right atrioventricular valve and tricuspid valve

Prevents backflow of blood to the right atrium

Pulmonary trunk leads to

Pulmonary artery

Pulmonary valve leads to

Pulmonary trunk

Right ventricle leads to

Pulmonary valve

Lungs leads to

Pulmonary vein

Right semilunar valve and pulmonary valve

Reduces backflow of blood from the pulmonary circuit

Aortic valve and left semilunar valve

Reduces backflow of blood from the systemic circuit

Vena cava leads to

Right atrium

Tricuspid valve leads to

Right ventricle

The ____________ ventricle pumps blood to the pulmonary circuit, while the _________ pumps blood to the systemic circuit.

Right; left

What structure is also known as the pacemaker of the heart?

SA node

List the order of the cardiac conduction system in order following the path of the electrical impulse

SA node; atrial syncytium, junctional fibers, AV node, AV bundle, bundle branches, Purkinje Fibers, ventricular syncytium

When the first heart sound is heard what is occurring with the heart valves?

The AV valves are closing

What occurs after ventricular systole begins?

The AV valves close and the semilunar valves open

What wave in an ECG tracing depicts ventricular repolarization?

The T wave

What is systolic pressure?

The maximum pressure achieved during ventricular contraction

Right atrium leads to

Tricuspid valve


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