Rehab Careers Circulatory System Practice Quiz

What is the primary function of the coronary arteries?

• To supply blood and oxygen to the lungs

• To supply blood and oxygen to the heart

• To remove waste products from the heart

• To regulate blood pressure

During which phase of the cardiac cycle does the majority of blood flow through the coronary system occur?

• Systole

• Diastole

• Isovolumetric contraction

• Isovolumetric relaxation

What is the correct order of the cardiac electrical impulse conduction?

• AV node, SA node, Purkinje fibers, Bundle of HIS

• SA node, AV node, Bundle of HIS, Purkinje fibers

• Purkinje fibers, Bundle of HIS, AV node, SA node

• Bundle of HIS, SA node, AV node, Purkinje fibers

What is the role of the Atrioventricular (AV) node in cardiac conduction?

• To generate electrical impulses

• To delay the impulse before it passes to the ventricles

• To directly stimulate the ventricles

• To repolarize the atria

Which structure in the heart's conduction system directly stimulates the ventricles to contract?

• SA node

• AV node

• Purkinje fibers

• Bundle of HIS

What is the primary purpose of an electrocardiogram (ECG)?

• To measure blood pressure

• To record the flow of electrical activity in the heart

• To assess lung function

• To determine oxygen levels in the blood

During which phase of the cardiac cycle does the majority of coronary blood flow occur?

• Systole

• Diastole

• Each are equal

Where is the first place of the electrical signal of the heart?

• SA node

• AV node

• Bundle of HIS

• Purkinje Fibers

Choose the 3 electrolytes needed for cardiac function

• magnesium

• calcium

• potassium

• sodium

The Frank-Starling Law of the Heart states that increased venous return leads to which of the following?

• Decreased heart rate

• A stronger contraction

• Lower blood pressure

• Reduced stroke volume

Tags

NGSS.HS-LS1-3