Cardiovascular System Quiz

Which description accurately depicts contractility?

• Ability of muscle cells to shorten

• Increased diameter of a vessel

• Loss of blood from a vessel break

• Elasticity of a blood vessel

What outcomes can occur due to aneurysms?

• Abnormal contractility

• Failure of venous valves

• Rupture of major arteries

• Diffuse edema

What condition leads to edema?

• Aneurysm

• Arrythmia

• Congestive heart failure

• Hemorrhage

Which description accurately depicts the force of the contraction of the heart?

• Decreases with an increase in stroke volume

• Decreases with an increase in ventricular filling

• Increases with decreased stretch to left ventricle

• Increases with increased blood from vena cavae

Which example accurately describes elasticity?

• Heart resuming its shape after being stretched

• Heart muscle cells stretching

• Force increasing with increased stretch to the heart

• Pressure being exerted by the blood against the vessel

Which option correctly describes autorhythmicity?

• Ability to generate action potentials independently

• Contractile property of cardiac muscle

• Stretch that occurs with venous return

• Volume of blood pumped during one contraction

The heart contains cells that generate action potentials with no external stimulus. Which term describes this feature?

• Autorhythmicity

• Contractility

• Elasticity

• Mass flow

Which structure in the right atrium helps to pace the heart?

• Atrioventricular bundle

• Atrioventricular node

• Purkinje fibers

• Sinoatrial node

Which sequence correctly places the electrical pathway of the heart in order?

• Sinoatrial node → atrioventricular node → atrioventricular bundle → purkinje fibers

• Atrioventricular node → atrioventricular bundle → sinoatrial node → purkinje fibers

• Purkinje fibers → sinoatrial node → atrioventricular node → atrioventricular bundle

• Atrioventricular bundle → atrioventricular node → purkinje fibers → sinoatrial node

What is the function of the atrioventricular node?

• Conduct impulses along the atria

• Slow the current from the SA node

• Increase heart rate

• Act as the pacemaker