During vigorous exercise, which combination of responses increases oxygen delivery to skeletal muscles, Decreased heart rate + vasoconstriction, Increased blood viscosity + decreased cardiac output, Increased heart rate + vasodilation of skeletal muscle arterioles., Decreased venous return + decreased blood pressure, A 65- year old man suddenly develops severe chest pain. The ECG shows myocardial infarction caused by blockage of a coronary artery. Which chamber of the heart is MOST likely affected, Right atrium, Left atrium, Right ventricles, Left ventricles, A patient with vitamin B12 deficiency develops megaloblastic anemia. Which process is directly affected?, Platelet aggregation, Plasma protein synthesis, White blood cell destruction, DNA synthesis during red blood cell production, During a marathon, an athlete’s cardiac output increases significantly. which combination BEST explains this increase?, Increased heart rate + increased stroke volume, Increased blood viscosity + decreased heart rate., Vasoconstriction + decreased venous return, Reduced stroke volume + decreased cardiac output, A patient with severe varicose veins complains of swelling after standing for long periods. What is the PRIMARY cause?, Increase arterial pressure, Increased capillary permeability, Reduced cardiac output, Failure of venous valve causing blood pooling, A patient has platelet count of 45000/µl. Which clinical finding is most likely?, Increased oxygen transport, Hypertension, Prolonged bleeding after injury, Faster wound healing, A patient with chronic kidney disease is diagnosed with anemia. Which hormone is most likely deficient?, Insulin, Antidiuretic Hormone (ADH), Aldosterone, Erythropoietin (EPO), A patient has damage to the mitral valve. Which complication is most likely to occur?, Blood flows from the aorta into the left ventricles, Blood flows from the right ventricles into the right atrium, Blood regurgitates from the left ventricle into the left atrium., Bloods flows from the pulmonary artery into the left atrium., Which blood vessel has the thickest tunica media?, Capillary, Venule, Vein, Artery, Which blood vessel that carry oxygenated blood from the lungs to the heart?, Pulmonary artery, Pulmonary vein, Superior Vena Cava, Inferior Vena Cava

CARDIOVASCULAR SYSTEM:HARD LEVEL

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