Cardiovascular System Quiz

What is the primary function of the cardiovascular system?

• hormone production

• nutrient, waste, & material transportation

• protection

• body temperature regulation

Which structure carries deoxygenated blood to the lungs for gas exchange?

• pulmonary arteries

• pulmonary veins

• aorta

• superior vena cava

The thick muscular layer of the heart responsible for contracting and generating force is called the:

• epicardium

• endocardium

• myocardium

• pericardium

Which division of the autonomic nervous system increases heart rate? (hint: think fight or flight)

• sympathetic

• somatic

• parasympathetic

Tags

NGSS.HS-LS1-3

The direction of conduction in the heart follows which pathway?

• SA node → AV node → Bundle of His → Purkinje fibers

• AV node → SA node → Bundle of His → Purkinje fibers

• Purkinje fibers → Bundle of His → AV node → SA node

• Bundle of His → Purkinje fibers → AV node → SA node

Which heart sound is produced as blood recoils against closed AV valves in the ventricles?

• S1 (Lub)

• S2 (Dup)

• S3

• S4

During which phase of the cardiac cycle do both AV and semilunar valves remain closed?

• ventricular ejection

• ventricular relaxation

• atrial systole

• isovolumic ventricular contraction

Which part of the ECG represents ventricular repolarization?

• p wave

• qrs complex

• t wave

• pr interval

What equation represents cardiac output (CO)?

• CO = heart rate × mean arterial pressure

• CO = stroke volume × peripheral resistance

• CO = heart rate × stroke volume

• CO = blood volume × heart rate

According to Poiseuille's Law, what happens to blood resistance as the radius of a vessel increases?

• increases

• decreases

• remains the same

• fluctuates