Question Bank: Body Fluids and Circulation

What is the primary function of red blood cells?

Which chamber of the heart receives deoxygenated blood from the body?

What structure prevents backflow of blood from the ventricles to the atria?

What is the sinoatrial node (SAN) commonly referred to as?

During which phase of the cardiac cycle do the ventricles contract?

Which type of valve is located between the left atrium and left ventricle?

Which vessel carries oxygen-rich blood from the heart to the body?

What effect does the sympathetic nervous system have on heart rate?

What is the role of the atrioventricular node (AVN) in the cardiac cycle?

What condition is characterized by consistently high blood pressure?

What happens to the aortic valve during ventricular systole?

Which of the following is NOT a component of blood?

Which hormone can increase cardiac output?

What is the purpose of the pericardial fluid?

What is lymph primarily composed of?

What condition is indicated by an irregular heartbeat?

Which function is NOT performed by lymph?

Which layer of the heart wall is responsible for its contraction?

Where does the lymphatic fluid ultimately drain back into?

What occurs during diastole in the heart?

Lymph differs from blood plasma mainly in its:

What role do lymphocytes in lymph fluid play?

What mechanism assists in the flow of lymph within the lymphatic vessels?

What is the primary function of lacteals in the lymphatic system?

Why is lymph often described as a tissue fluid?

Which type of immunity is mainly provided by lymphocytes?

In which area of the body is lymph most likely to encounter pathogens?

Which fluid is the main carrier of immune cells in the body?

What is the main difference between interstitial fluid and lymph?

Which hormone is known to aid in lymph formation?

What can excessive lymph accumulation lead to?

What is the primary role of the lymphatic system in the body?

What type of cells primarily form the lymphatic tissue?

What type of circulatory system do arthropods possess?

Which chamber of the heart receives deoxygenated blood from the body?

Which blood vessels carry oxygenated blood away from the heart?

What is the primary function of the lymphatic system?

Which type of circulatory pattern is more efficient for higher organisms?

What distinguishes a 4-chambered heart from a 3-chambered heart?

What occurs during the cardiac cycle?

Why is the sinoatrial (SA) node important?

In which type of circulation does blood flow from the heart to the lungs and back?

Which factor does NOT affect cardiac output?

What happens to oxygenated blood after it leaves the left ventricle?

Which blood component is primarily involved in clotting?

How does the circulatory system of mammals differ from that of amphibians?

What causes the 'lub' sound during a heartbeat?

What type of circulatory system is found in humans?

Which two main circulatory paths are involved in double circulation?

How does the right ventricle function in double circulation?

Which structure separates oxygenated and deoxygenated blood in the human heart?

What is the major advantage of double circulation over single circulation?

In which group of animals is double circulation found besides mammals?

During which phase of the cardiac cycle does the left ventricle pump oxygenated blood into the aorta?

Which valve prevents the backflow of blood from the aorta into the left ventricle?

In double circulation, what is the role of the pulmonary circuit?

What term describes the condition when both deoxygenated and oxygenated blood mix in a heart?

What type of blood vessels carry oxygenated blood in systemic circulation?

Which chamber receives deoxygenated blood from the body?

In which phase does the heart receive blood?

What is the primary role of the left ventricle?

What occurs in the lungs during the pulmonary circulation?

What is the primary role of the sinoatrial node (SAN) in the heart?

Which part of the autonomic nervous system increases the heart rate?

What effect do adrenal medullary hormones have on cardiac activity?

How does the parasympathetic nervous system affect heart function?

What is the normal resting heart rate for a healthy adult?

Which physiological mechanism is responsible for the myogenic nature of the heart?

What is cardiac output?

What role does the medulla oblongata play in regulating cardiac activity?

What is the effect of increasing stroke volume on cardiac output?

Which ion is primarily responsible for depolarization of the cardiac muscle cell membranes?

Which component of the cardiac cycle follows ventricular contraction?

The primary purpose of cardiac output regulation is to ensure?

Which part of the nervous system decreases heart rate during relaxation?

What is the average cardiac output for a healthy adult at rest?

When blood pressure is measured as 140/90 mm Hg, what does this indicate?

What is the definition of hypertension?

Which condition is characterized by chest pain due to insufficient oxygen to the heart muscle?

What causes coronary artery disease?

Which of the following is a symptom of heart failure?

How does regular hypertension affect the kidneys?

What is the average lifespan of red blood cells?

Which of the following is NOT a direct effect of high blood pressure?

What primarily fuels the symptoms of angina?

What lifestyle change can help manage hypertension?

What effect can untreated coronary artery disease have?

What regulates the heart's rhythm?

How is heart failure distinct from a heart attack?

What is a common diagnostic tool used to measure blood pressure?

What indicates a severe case of coronary artery disease?

What type of fluid is primarily responsible for transporting nutrients in the body?