30 Questions
Which side of the heart pumps blood to the lungs?
Right side
What is the function of the chordae tendinae?
To keep the heart valves from turning inside out
During which phase of the heartbeat cycle does the atria relax?
Ventricular systole
What is the name of the valve that separates the left atrium from the left ventricle?
Bicuspid valve
What is the function of the semilunar valves?
To keep blood from flowing backwards
What is the period of relaxation in the heartbeat cycle called?
Diastole
What is the function of the interatrial septum?
Divide the left and right atrium
What is the role of the atrioventricular node in the heart's electrical conduction system?
Collect the contraction impulse from the atria
What is the correct sequence of the heart's electrical conduction system?
SA node, atrioventricular node, AV bundle, Purkinje fibers, ventricles
What do the P-waves on an ECG/EKG represent?
Atrial contraction
What is the primary function of the pulmonary circuit?
Oxygenate the blood and return it to the left side of the heart
What is the term for the entire heart returning to diastole after the ventricles have contracted?
Diastole
What is the function of albumin in the blood?
Helps control the amount of water in the blood
What is the role of thrombin in the blood clotting process?
Causes fibrinogen to change to strands of fibrin
What is the function of fibrinogen in the blood clotting process?
Changes to strands of fibrin
What is the function of eosinophils in the body?
Phagocytosis of antigen-antibody complexes
What is the function of basophils in the body?
Release heparin and histamine
What is the function of neutrophils in the body?
Engulf microbes by phagocytosis
What is the main cause of iron deficiency anemia?
Inability to absorb iron from the digestive system
What is the result of sickle cell anemia?
RBCs are fragile and rupture easily, clogging small blood vessels
What is the significance of the Rh factor during pregnancy?
It can cause hemolytic disease of the newborn in Rh-negative women
What is the term for the clumping of RBCs when someone's antibodies contact a foreign cell?
Agglutination
What is the blood type of an individual with both A and B antigens on their RBCs?
Type AB
What is the term for the absence of A and B antigens on the RBCs?
O blood type
What is the shape of the nucleus of a monocyte?
Horseshoe or kidney bean shaped
What is the function of B lymphocytes?
To produce antibodies
What is the life cycle of a red blood cell?
Produced in the red bone marrow, circulate for 120 days, and destroyed in the liver, spleen, and bone marrow
What is the name of the disease caused by the Epstein-Barr virus?
Infectious Mononucleosis
What is the function of perforin?
To put openings in the cell membrane of the target cell
What is the name of the hormone that stimulates the production of red blood cells?
Erythropoietin
Test your knowledge of the heart's structure and function, including the path of blood flow, the four chambers, heart valves, and the sounds they produce. Learn about the differences between the left and right sides of the heart and how they work together to keep you alive.
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