A&P Chapter 6 Flashcards
An alpha globulin made in the liver that is converted to thrombin
Prothrombin
The portion of the electric conduction system in the interventricular septum that conducts the depolarizing impulse from the atrioventricular junction to the right and left bundle branches
Bundle of His
A waste product of red blood cell destruction that undergoes further metabolism in the liver
Bilirubin
Cells that protect the body against disease, particularly infectious disease; also called leukocytes
White Blood Cells
The semilunar valve that regulates blood flow from the left ventricle to the aorta
Aortic Valve
Specialized muscles that attach the ventricles to the cusps of the valves by muscular strands called chordae tendineae
Papillary Muscles
A group of complex electrical tissues within the heart that initiate and transmit stimuli that result in contractions of myocardial tissue
Cardiac Conduction System
Control of bleeding by formation of a blood clot
Hemostasis
A chemical found in mast cells that, when released, causes vasodilation, capillary leaking, and bronchiole constriction
Histamine
Blockage of one or more of the arteries that supply oxygen to the heart, resulting in death to a portion of the myocardium
Myocardial Infarction
Substances or molecules that, when taken into the body, stimulate an immune system response and cause formation of specific protective proteins called antibodies
Antigens
A serious condition that results when a pregnant woman’s blood type is incompatible with the fetus’s blood type and antibodies from the mother enter the fetal circulation and destroy the fetus’s red blood cells
Erythroblastosis Fetalis
Incomplete cells important in blood clotting; also called platelets
Thrombocytes
White blood cells that work to produce chemical mediators during an immune response; make up approximately 1% of leukocytes
Basophils
The vein that forms when the anterior and posterior tibial veins unite at the knee
Popliteal Vein
One of the two branches of the left main coronary artery
Circumflex Coronary Artery
Infection or inflammation of the pericardial membranes, resulting in severe chest pain
Pericarditis
A white insoluble protein formed from fibrinogen in the clotting process
Fibrin
The proximal part of the main artery of the arm, which supplies the brain, neck, anterior chest wall, and shoulder
Subclavian Artery
Hormone produced by the adrenal medulla that has a vital role in the function of the sympathetic nervous system; also called adrenaline
Epinephrine
Lymphocytes that produce and secrete antibodies that bind and destroy foreign antigens; they exist in the blood, lymph nodes, bone marrow, intestinal lining, and spleen
B Cells
The dominant pacemaker of the heart, located at the junction of the superior vena cava and the right atrium
Sinoatrial (SA) Node
A life-saving procedure to correct cardiac tamponade, in which a needle is inserted into the pericardial sac to remove excess fluid that is restricting the heart from expanding and contracting properly
Pericardiocentesis
Deflections of the ECG produced by ventricular depolarization
QRS Complex
The two arches formed from the radial and ulnar vessels within the hand
Palmar Arches
The semilunar valve that regulates blood flow between the right ventricle and the pulmonary artery
Pulmonary Valve
Insufficient oxygen at a particular tissue site often associated with obstruction of arterial blood flow to the site
Ischemia
The upper Chambers of the heart; they receive blood returning to the heart
Atria
Sense organs that monitor the levels of oxygen and carbon dioxide and the pH of the cerebrospinal fluid and blood and provide feedback to the respiratory centers to modify the rate and depth of breathing based on the body’s needs at any given time
Chemoreceptors
Blood clots
Thrombi
A naturally occuring clot-dissolving enzyme, usually present in the body in its inactive form, plasminogen
Plasmin
An opening in the cranial vault through which the carotid arteries enter
Carotid Canals
A process by which leukocytes leave blood vessels to move toward tissue where they are needed most
Diapedesis
The effect on the contractility of muscle tissue, especially cardiac muscle
Inotropic Effect
The heart valve that separates the right atrium from the right ventricle
Tricuspid Valve
An abnormal heart sound, heard as “whooshing,” indicating turbulent blood flow within the heart
Heart Murmur
The veins to which blood empties after liver cells in the sinusoids of the liver extract nutrients, filter the blood, and metabolize various drugs
Hepatic Veins
Veins that collect blood that is returning from the walls of the heart
Coronary Sinus
Restriction of cardiac contraction, failing cardiac output, and shock, caused by the accumulation of fluid or blood in the pericardium
Cardiac Tamponade
The flaps that comprise the heart valves
Cusps
Pain caused by partial occlusion of the mesenteric artery from atherosclerosis
Mesenteric Angina
One of the three described portions of the aorta; the section of the aorta between the ascending and descending portions that gives rise to the right brachiocephalic (innominate), left common carotid, and left subclavian arteries
Aortic Arch
A property of cardiac cells that provides the cells with the ability to respond to electrical impulses
Excitability
Cells that develop from the monocytes that provide some of the body’s first line of defense in the inflammatory process
Macrophages
White blood cells that are one of the three types of granulocytes; they have multi-lobed nuclei that resemble a string of baseballs held together by a thin strand of thread; they destroy bacteria, antigen/antibody complexes, and foreign matter
Neutrophils
The latter phase of repolarization in which the cells are able to respond to a stronger-than-normal stimulus
Relative Refractory Period
An important element of the fibrinolytic system; causes clots that have already formed to lyse or be disrupted; works by converting plasminogen to plasmin
Tissue Plasminogen Activator
The complex arrangement of tubes, including the arteries, arterioles, capillaries, venules, and veins, that moves blood, oxygen, nutrients, carbon dioxide, and cellular waste throughout the body
Circulatory System
The two main veins that drain the head and neck
Jugular Veins
Spaces between the membranes surrounding the brain that are the primary means of venous drainage from the brain
Venous Sinuses
The layer of the serous pericardium that lines closely against the heart; also called the epicardium
Visceral Layer
A lower than normal hemoglobin or erythrocyte level
Anemia
Cells resembling basophils that are formed in response to allergens. When allergens attach to antigens on the surface, the cells release potent inflammatory mediators resulting in allergic symptoms or potentially anaphylaxis
Mast Cells
The ability of cardiac cells to conduct electrical impulses
Conductivity
One of two layers of the serous pericardium; it is separated from the visceral pericardium by a small amount of pericardial fluid
Parietal Layer
The upright, flat, or inverted wave following the QRS complex of the ECG, representing ventricular repolarization
T-Wave
An electrical charge difference that is created by the difference in sodium and potassium concentration across the cell membrane at any given instant
Electrical Potential
A specialized part of the venous system that drains blood from the liver, stomach, intestines, and spleen
Hepatic Portal System
White blood cells with a major role in allergic reactions and bronchoconstriction during an asthma attack; make up approximately 1% to 3% of leukocytes
Eosinophils
A molecular (ion-transporting) mechanism whereby sodium is actively moved out of a cell and potassium moved in
Sodium-Potassium Pump
The percentage of blood that leaves the heart each time it contracts
Ejection Fraction
An abnormal whooshing sound indicating turbulent blood flow within a narrowed blood vessel; usually heard in the carotid arteries
Bruit
Infection of a heart valve
Endocarditis
The process of blood cell production in the bone marrow; also called hemopoiesis
Hematopoiesis
One of the two branches of the left main coronary artery
Anterior Descending (LAD) Coronary Artery
A heartbeat; each consists of ventricular contraction (systole) and relaxation (diastole)
Cardiac Cycle