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WorksheetsCirculatory System Quiz
Total questions: 20
Worksheet time: 15mins
What is the primary function of the circulatory system?
To produce hormones
To transport blood, nutrients, gases, hormones, and wastes
To digest food
To store energy
Which component of the blood is responsible for carrying oxygen using hemoglobin?
White Blood Cells (WBCs)
Platelets
Red Blood Cells (RBCs)
Plasma
What is the role of the right ventricle in the heart?
Receives oxygenated blood from the lungs
Pumps deoxygenated blood to the lungs
Pumps oxygenated blood to the body
Receives deoxygenated blood from the body
Which type of blood vessel carries oxygenated blood away from the heart?
Veins
Capillaries
Arteries
Lymph vessels
How do capillaries function in the circulatory system?
They pump blood to the heart
They carry oxygenated blood away from the heart
They are pathways for blood flow
They are sites for gas and nutrient exchange
What is the function of the tricuspid valve in the heart?
It prevents backflow of blood between the left atrium and left ventricle.
It prevents backflow of blood between the right atrium and right ventricle.
It prevents backflow of blood between the left ventricle and aorta.
It prevents backflow of blood between the right ventricle and pulmonary artery.
Which phase of the cardiac cycle involves the heart filling with blood?
Systole
Diastole
Contraction
Relaxation
What is the role of the sinoatrial (SA) node in the heart?
It relays impulses to the ventricles.
It transmits signals for ventricular contraction.
It acts as the pacemaker of the heart.
It prevents backflow of blood.
Why are arteries thick-walled and elastic?
To allow exchange of gases, nutrients, and wastes.
To prevent backflow of blood.
To withstand high pressure.
To form a network between arterioles and venules.
Explain the importance of capillaries in the circulatory system.
They prevent backflow of blood.
They allow exchange of gases, nutrients, and wastes.
They act as the pacemaker of the heart.
They transmit signals for ventricular contraction.
What is the primary function of red blood cells (erythrocytes)?
To defend against pathogens
To carry oxygen
To initiate clot formation
To regulate blood pressure
Which type of blood circulation carries oxygenated blood from the left side of the heart to the body?
Pulmonary circulation
Systemic circulation
Coronary circulation
Lymphatic circulation
What is the normal blood pressure reading for a healthy adult?
140/90 mmHg
120/80 mmHg
100/60 mmHg
160/100 mmHg
Explain how the shape of red blood cells contributes to their function.
Their spherical shape allows them to roll easily through blood vessels.
Their biconcave shape increases surface area for gas exchange.
Their elongated shape helps them move quickly through the bloodstream.
Their irregular shape allows them to capture more oxygen.
What role do platelets (thrombocytes) play in the circulatory system?
They transport oxygen.
They defend against pathogens.
They are involved in clotting.
They regulate blood pressure.
What is the main cause of a heart attack (myocardial infarction)?
Increased force of blood flow
Buildup of plaque in arteries
Blockage in coronary arteries
Reduced RBC count
Which condition is characterized by a buildup of plaque in the arteries?
Hypertension
Atherosclerosis
Anemia
Stroke
What is the function of hemoglobin in red blood cells?
Carries deoxygenated blood
Carries oxygen
Acts as a pacemaker
Exchanges materials between blood and tissues
Which of the following is the largest vein in the body?
Aorta
Capillary bed
Vena Cava
SA Node
Explain how a stroke can occur and the difference between ischemic and hemorrhagic strokes.
Stroke occurs due to a blockage or burst blood vessel; ischemic is a blockage, hemorrhagic is a burst.
Stroke occurs due to high blood pressure; ischemic is a burst, hemorrhagic is a blockage.
Stroke occurs due to reduced RBC count; ischemic is a burst, hemorrhagic is a blockage.
Stroke occurs due to plaque buildup; ischemic is a blockage, hemorrhagic is a burst.
