Understanding the Cardio System

What is the main function of the left ventricle in the heart?

• To pump oxygenated blood to the lungs

• To pump oxygenated blood to the rest of the body

• To receive deoxygenated blood from the body

• To receive oxygenated blood from the lungs

Which of the following structures prevents the backflow of blood from the right ventricle to the right atrium?

• Mitral valve

• Aortic valve

• Tricuspid valve

• Pulmonary valve

What is the primary role of the pulmonary arteries?

• To carry oxygenated blood from the lungs to the heart

• To carry deoxygenated blood from the heart to the lungs

• To carry oxygenated blood from the heart to the body

• To carry deoxygenated blood from the body to the heart

Which of the following is a common symptom of coronary artery disease?

• Frequent urination

• Chest pain or discomfort

• Sudden weight gain

• Persistent cough

What is the effect of regular exercise on the cardiovascular system?

• Decreases heart rate and increases blood pressure

• Increases heart rate and decreases blood pressure

• Strengthens the heart muscle and improves circulation

• Weakens the heart muscle and reduces circulation

Which of the following is a risk factor for developing hypertension?

• Low salt intake

• Regular physical activity

• High body mass index (BMI)

• Adequate sleep

What is the normal range for systolic blood pressure in adults?

• 60-80 mmHg

• 80-100 mmHg

• 100-120 mmHg

• 120-140 mmHg

Which part of the heart is responsible for initiating the heartbeat?

• Atrioventricular node

• Sinoatrial node

• Bundle of His

• Purkinje fibres

What is the primary function of red blood cells in the circulatory system?

• To fight infections

• To transport oxygen

• To clot blood

• To regulate body temperature

Which of the following conditions is characterised by the narrowing of the arteries?

• Atherosclerosis

• Arrhythmia

• Cardiomyopathy

• Myocarditis