Circulatory/Cardiac Quiz

What is the primary function of the heart in the circulatory system?

• To filter blood

• To produce blood cells

• To pump blood throughout the body

• To store blood

Which type of blood vessel is responsible for carrying oxygen-rich blood away from the heart?

• Veins

• Arteries

• Capillaries

• Venules

During which phase of the cardiac cycle does the heart fill with blood?

• Systole

• Diastole

• Atrial systole

• Ventricular systole

What is the main component of blood?

• White blood cells

• Red blood cells

• Plasma

• Platelets

Which heart disease is characterized by the narrowing of the coronary arteries?

• Myocardial infarction

• Arrhythmia

• Coronary artery disease

• Heart failure

How is oxygen primarily transported in the blood?

• Dissolved in plasma

• Attached to white blood cells

• Bound to hemoglobin in red blood cells

• Within platelets

What is the correct sequence of blood flow through the heart?

• Right atrium → right ventricle → lungs → left atrium → left ventricle

• Left atrium → left ventricle → lungs → right atrium → right ventricle

• Right ventricle → right atrium → lungs → left ventricle → left atrium

• Left ventricle → left atrium → lungs → right ventricle → right atrium

Which layer of the heart is responsible for its pumping action?

• Endocardium

• Myocardium

• Pericardium

• Epicardium

What is the function of capillaries in the circulatory system?

• To pump blood

• To filter blood

• To exchange gases and nutrients

• To store blood

What triggers the heartbeat?

• The brain

• The sinoatrial (SA) node

• The aorta

• The ventricles