The Heart and Circulation

The two superior receiving chambers of the heart are known as the _________

• atria
• ventricles

Blood leaves the right ventricle through the ___________.

• Pulmonary Artery

• Aorta

• Superior vena cava

• Pulmonary Vein

The term that means heart contraction is ________.

• diastole
• systole
• tachycardia
• fibrillation

The VOLUME of blood pumped out of a ventricle with each heartbeat is known as ________ 

• Heart Rate
• Stroke Volume
• Cardiac Output
• Blood Pressure

Large blood vessels that carry blood away from the heart are called:

• arteries
• capillaries
• veins
• venae cavae

Tunica _______, the middle layer of a typical blood vessel, contains smooth muscle and elastic fibers.

• intima
• externa
• media
• adventitia

Pulmonary circulation involves blood flow to and from the heart and the _______.

• body
• digestive organs
• brain
• lungs

When the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the ________.

• right ventricle to right atrium
• left ventricle to left atrium
• left atrium to the right atrium
• right atrium to the left atrium

A person with a heart rate of 75 beats per minute and stroke volume of 60 mL per beat has a cardiac output of _______.

• 4500 mL/min
• 1.25 mL/min
• 0.8 mL/min
• 120 mL/min

The heart sounds "lub" and "dup" result from ________. 

• opening of the heart valves
• firing of the nodes of the intrinsic conduction system
• blood rushing through the chambers
• closure of heart valves