The Heart Quiz

External features of the heart include

Internal features of the heart include

Select the correct order of the heart wall's 3 layers from outside of the heart to inside of the heart

The right and left ventricles are receiving chambers that collect blood

The ventricles are discharging chambers.

Select the characteristics of the right ventricle

List the characteristics of the left ventricle

The epicardium layer of the heart wall consists of [blank_start]epithelium[blank_end] and loose connective tissue. The myocardium layer of the heart wall consists of [blank_start]cardiac muscle[blank_end] and connective tissue. The endocardium layer of the heart wall consists of [blank_start]endothelium[blank_end] and loose connective tissue.

The atrioventricular (AV) valves or cuspid valves prevent backflow from the [blank_start]ventricles[blank_end] into the [blank_start]atria[blank_end].

Semilunar valves prevent backflow from [blank_start]arteries[blank_end] to [blank_start]ventricles[blank_end].

The following relates to which valves: upon contraction, closed flaps are held in place by chordeae tendinae that are attached to papillary muscles.

The following relates to which valves: upon contraction, pressure increases, flattening the pockets and opening the valve.

Upon relaxation, AV valves [blank_start]open[blank_end] and back flow from vessels [blank_start]close[blank_end] semilunar valves.

The pathway of the heart begins at the superior and inferior vena cava, and continues to the [blank_start]right atrium[blank_end], [blank_start]tricuspid AV valve[blank_end], [blank_start]right ventricle[blank_end], [blank_start]pulmonary semilunar valve[blank_end], pulmonary trunk, [blank_start]pulmonary arteries[blank_end], lungs, [blank_start]pulmonary veins[blank_end], [blank_start]left atrium[blank_end], [blank_start]bicuspid AV valve[blank_end], [blank_start]left ventricle[blank_end], [blank_start]aortic semilunar valve[blank_end], [blank_start]aorta[blank_end], body and back to the vena cava.

The pulmonary circuit involves the left side of the heart.

The systemic circuit involves the left side of the heart.

The coronary circuit is the shortest one in the body and supply the tissues of the heart.

The conducting system [blank_start]conducts[blank_end] the heart beat whereas the autonomic nervous system [blank_start]modifies[blank_end] it. The sympathetic nervous system [blank_start]accelerates[blank_end] the heart beat while the parasympathetic [blank_start]slows down[blank_end] the heart beat.

At the lungs, which exchange of gases occurs?

The [blank_start]medulla oblongata[blank_end] is the cardiac center for the autonomic nervous system.

The path of impulse of the contraction is [blank_start]SA node[blank_end], [blank_start]AV node[blank_end], [blank_start]AV bundle[blank_end], [blank_start]right and left bundle[blank_end], [blank_start]Purkinje fibers[blank_end].

An electrocardiogram (ECG) are the

The order of the electrical events of the ECG are

What occurs at the P wave?

What occurs at the QRS complex?

What occurs at the T wave?

The QT interval in the ECG is ventricular contraction, ie depolarization and repolarization of the ventricles

The PQ interval is the time for conduction from ventricles to SA nodes.

At systole, [blank_start]contraction[blank_end] occurs which includes isovolumetric ventricular [blank_start]contraction[blank_end] and ventricular [blank_start]ejection[blank_end].

At diastole, [blank_start]relaxation[blank_end] occurs which includes isovolumetric ventricular [blank_start]relaxation[blank_end] and ventricular [blank_start]relaxation[blank_end].

Blood flowing thru the heart is controlled by increasing and decreasing pressure reflecting contraction and relaxation.

Which event does the following describe?: QRS complex occurs, ventricles contract, atria relax, pressure rises in ventricles which causes the AV + semilunar valves close (2nd heart sound)

Which event does the following describe?: low pressure, blood flowing through atria and ventricles, AV valves open, semilunar valves are closed

Which event does the following describe?: P wave occurs at 70% filling, and atria contract, AV valves close (1st heart sound), semilunar valve is closed, at this point ventricles are at their largest volume (end diastolic volume)

Which event does the following describe?: semilunar valves are closed, AV valves are closed, ventricles begin to relax and pressure in ventricles drops; blood flows back against cusps of semilunar valves and forces them closed. Blood flows into the relaxed atria

The first heart sound LUB occurs when

The second heart sound DUB occurs when

Murmurs occur when the two heart sounds are normal.

Stroke volume is calculated by ESV - EDV

Cardiac output is calculated by SV x HR