Cardiac Cycle

What vessels feed into the right atrium?

• vena cavae

• coronary sinus

• pulmonary truck

• aorta

• pulmonary veins

What phase of the cardiac cycle causes blood to be ejected into the aorta?

• atrial systole

• atrial diastole

• ventricular systole

• ventricular diastole

In the cardiac cycle the atria and ventricles are in systole at the same time.

• true

• false

Answer explanation

The atria and ventricles are in diastole/rest at the same time. This when blood flows to the heart muscle and delivers oxygen and nutrients.

The amount of blood ejected from the ventricles in 1 heart beat is called?

• EDV

  end diastolic volume

• ESV

  end systolic volume

• SV

  stroke volume

Answer explanation

Each ventricle pumps ~70 mLs/heart beat. Even though it doesn't look like it, both ventricles pump the same amount of blood.

The cardiac cycle does not require nerve stimulation to contract like other muscles

• True

• False

The P wave of an ECG represents

• atrial diastole

• atrial systole

• ventricular systole

• ventricular diastole

 This triggers contraction in the ventricle:

• SA node
• AV node
• QT node
• AV Bundles

 This triggers contraction in the atria:

• SA node
• AV node
• QT node
• AV Bundles

The SA Node generates an impulse about ____ times per minute.

• 50
• 75
• 125
• 100

Venticular Systole occurs...

• P Wave through PR Segment
• QRS Complex To T Wave begins
• QRS to End of T Wave
• T Wave to Next P Wave