#1
Which of the following is a primary function of the cardiovascular system?
Transportation of oxygen and nutrients
ExplanationCardiovascular system transports oxygen and nutrients.
#2
What is the main organ responsible for oxygen exchange in the respiratory system?
Lungs
ExplanationLungs facilitate oxygen exchange in the respiratory system.
#3
Which gas is exchanged during respiration to provide oxygen to the body's cells?
Oxygen
ExplanationOxygen is exchanged during respiration for cellular oxygenation.
#4
What is the function of the diaphragm in the respiratory system?
Contracting and relaxing to aid breathing
ExplanationDiaphragm aids breathing by contracting and relaxing.
#5
Which chamber of the heart pumps blood to the rest of the body?
Left ventricle
ExplanationLeft ventricle pumps blood to the body.
#6
What is the primary role of the pulmonary veins in the circulatory system?
Carrying oxygenated blood to the heart
ExplanationPulmonary veins carry oxygenated blood to the heart.
#7
What is the purpose of the sinoatrial (SA) node in the heart's electrical conduction system?
Initiating the heartbeat
ExplanationSA node initiates the heartbeat in the heart's electrical conduction system.
#8
During which phase of the cardiac cycle does the heart relax and fill with blood?
Diastole
ExplanationHeart relaxes and fills with blood during diastole.
#9
What is the medical term for difficulty breathing?
Dyspnea
ExplanationDifficulty breathing is termed as dyspnea.
#10
What is the purpose of the alveoli in the respiratory system?
Gas exchange with the bloodstream
ExplanationAlveoli facilitate gas exchange with the bloodstream.
#11
Which blood vessel carries oxygenated blood away from the heart to the body's tissues?
Artery
ExplanationArtery carries oxygenated blood to body tissues.
#12
During which phase of the cardiac cycle does blood enter the atria?
Diastole
ExplanationBlood enters the atria during diastole.
#13
Which of the following is a common symptom of cardiovascular disease?
Chest pain
ExplanationChest pain is a common symptom of cardiovascular disease.
#14
Which of the following is a function of the cardiovascular system?
Supplying oxygen and nutrients to tissues
ExplanationCardiovascular system supplies oxygen and nutrients to tissues.
#15
Which of the following is a risk factor for cardiovascular diseases?
Smoking
ExplanationSmoking is a risk factor for cardiovascular diseases.
#16
What is the role of hemoglobin in the cardiovascular system?
Carrying oxygen
ExplanationHemoglobin carries oxygen in the cardiovascular system.
#17
Which respiratory condition is characterized by inflammation and narrowing of the airways?
Asthma
ExplanationAsthma is characterized by airway inflammation and narrowing.
#18
What is the purpose of the sinoatrial (SA) node in the heart?
Conducting electrical impulses
ExplanationSA node conducts electrical impulses in the heart.
#19
What is the primary function of the bronchi in the respiratory system?
Conducting air to the lungs
ExplanationBronchi conduct air to the lungs in the respiratory system.
#20
Which factor is a major contributor to the development of atherosclerosis?
High cholesterol levels
ExplanationHigh cholesterol levels contribute to atherosclerosis development.
#21
What is the primary function of the atrioventricular (AV) node in the heart's electrical conduction system?
Conducting electrical impulses to the ventricles
ExplanationAV node conducts electrical impulses to the ventricles in the heart's electrical conduction system.