BIOS 256 CHAMBERLAIN EXAM 3 REVIEW WITH QUESTIONS AND ANSWERS ALREADY GRADED A+ 100% 2024 UPDATED

BIOS 256 CHAMBERLAIN EXAM 3 REVIEW WITH QUESTIONS AND ANSWERS ALREADY GRADED A+ 100% 2024 UPDATED Fred's blood was determined to be AB positive. What does this mean? - Answer-There are no antibodies to A, to B, or to RH antigens in his plasma If cardiac muscle is deprived of its normal blood supply, damage would primarily result from - Answer-impaired delivery of oxygen When red blood cells wear out, the iron of hemogoblin is saved and recycled. The remainder of the heme is - Answer-excreted as bile pigments (bilirubin). Which is NOT a vital sign used to assess the cardiovascular system? - Answer-serum cholesterol The tricuspid valve is closed - Answer-when the right ventricle is in systole Skeletal muscle assists the heart in moving blood through - Answer-veins Norepinephrine acts on heart muscle cells by - Answer-causing threshold to be reached more quickly The molecule binding calcium in smooth muscle cells is - Answer-calmodulin Damage to the _________ is referred to as heart block. - Answer-atrioventricular node Which component of the intrinsic autorhythmicity system of the heart functions to assure that the ventricles contract after the atria? - Answer-atrioventricular node The effect of endurance-type athletic training may be to lower the resting heart rate. The phenomenon - Answer-is caused by the hypertrophy of the heart muscle Cancer of lymphoblasts developing quickly in a young child would b called - Answer-acute lymphocytic leukemia Oxygen is transported by red blood cells, it is carried by - Answer-attaching to the iron ion in heme The blood vessel type removing carbon dioxide and wastes from the tissues is the - Answer-vein If plasma proteins are lost due to kidney disease, then which of the following pressure changes occur as a result? - Answer-blood colloid osmotic pressure decreases Select the correct statement about factors that influence blood pressure - Answer-Excess red cell production would cause a blood pressure increase. The diameter of blood vessels most directly affects - Answer-resistance Normal heart sounds are caused by which of the following events? - Answer-closure of the heart valves Which of the following is NOT required for erthropoiesis - Answer-production of vacuoles On average, normal resting cardiac output for an adult is about - Answer-5 liter/min The role of calcium ions in muscle contraction is to - Answer-bind to regulatory sites on troponin, changing troponin's shape. Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the ________ period during which calcium ions are released from the terminal cristerae - Answer-latent The P wave of a normal electrocardiogram indicates - Answer-atrial depolarization A motor neuron and the myofibers it innervates is known as a(n) - Answer-motor unit Which is NOT a risk factor for essential hypertension? - Answer-circulatory shock How does exercising assure greater blood delivery to the active muscles? - Answer- Which blood protein(s) regulates osmotic pressure, pulling water into blood? - Answer-albumin Which blood protein(s) serves as antibodies that tag foreign substances for elimination from the body? - Answer-gamma globulins The number of muscle fibers in a contracted state in an otherwise relaxed muscle is known as its - Answer-muscle tone The least abundant human leukocytes are the - Answer-basophils Hemorrhage with a large loss of blood causes - Answer-a lowering of blood pressure due to change in cardiac output Which is the correct equation for the relationship between blood pressure (BP), cardiac output (CO), and peripheral resistance (PR)? - Answer-BP=CO x PR Which tissue uses over half the oxygen in blood vessels serving it? - Answer-heart Which hormone reduces blood pressure? - Answer-Atrial natriuretic peptide (ANP) Which provides a positive chronotropic effect on the heart? - Answer-norepinephrine What ion is responsible for the depolarization of cardiac autorhythmic cells during an action potential? - Answer-calcium Which of the following is a precursor of a eosinophil? - Answer-myeloblast After nervous stimulation of the muscle cell has ceased, the acetylcholine - Answer-is destroyed by acetyl choline esterase Sickling of the red blood cells can be produced in those with sickle cell anemia by - Answer-travel at high altitudes The cardiac muscle contraction occurs when - Answer-Ca enters the myofibers through slow channels When the systemic mean arterial pressure is less then 60 mm Hg, - Answer-syncope may follow The velocity of blood flow - Answer-is slowest in the capillaries because the total cross sectional area is the greatest Which of the following are composed of myosin? - Answer-thick filaments The functional unit of a skeletal muscle is - Answer-sarcomere An increase in venous return most directly affects - Answer-stroke volume