Heart and Circulatory System Questions

Which structure in the heart serves as the natural pacemaker?

• Aortic valve

• Sinoatrial node

• Left ventricle

• Carotid artery

What is the main artery that carries oxygenated blood from the heart to the rest of the body?

• Carotid artery

• Aorta

• Coronary artery

• Peripheral vascular artery

Which heart chamber pumps oxygenated blood into the aorta?

• Right atrium

• Left ventricle

• Right ventricle

• Sinoatrial node

Which valve controls blood flow between the left ventricle and the aorta?

• Mitral valve

• Aortic valve

• Pulmonary valve

• Tricuspid valve

What is the term for reduced blood supply to the heart muscle?

• Myocardial infarction

• Ischemia

• atherosclerosis

• Aneurysm

What condition occurs when the mitral valve does not close properly, allowing blood to flow backward?

• Aortic stenosis

• Mitral regurgitation

• Endocarditis

• Ventricular tachycardia

What is another name for a heart attack?

Which artery supplies blood to the brain?

• Aorta

• Carotid artery

• Coronary artery

• Peripheral artery

What is the absence of electrical activity in the heart called?

• Asystole

• Ventricular tachycardia

• Ischemia

• Angina

What device is implanted to regulate heartbeats?

• Defibrillator

• Pacemaker

• Echocardiogram

• Angioplasty