A & P 2 Straighterline Final Exam Latest Update Graded A+

A & P 2 Straighterline Final Exam Latest Update Graded A+ When erythrocytes are destroyed, which of the following events occurs? The globin portion of the molecule is broken down into amino acids. Type AB blood has both A and B antigens on the red cells In the platelet release reaction, ADP and thromboxanes stimulate other platelets to become activated. The hematocrit is d. the percentage of RBCs in a given volume of blood. What vitamin is necessary to produce many clotting factors in the liver? Vitamin K A white blood cell engulfing a bacterium is an example of blood functioning in a. protection. The oxygenated form of hemoglobin is called oxyhemoglobin The only formed elements that possess a nucleus when mature are the c. leukocytes Plasma . is the liquid matrix of the blood. An increased amount of heparin in the blood might . prevent clotting process. On which chromosome is there a mutation that leads to sickle cell anemia? b. chromosome 11 Blood consists of a matrix of plasma and cells; blood is a subtype of ______ tissue. e. connective The ability of white blood cells to leave the circulation and enter tissues is called b. diapedesis. The nervous system and certain chemicals can cause the constriction of a blood vessel. This is known as b. vascular spasm The cascade of events in the intrinsic pathway can be set into motion when _____ comes into contact with collagen. factor XII If a blood buffer is absent, what function of the blood would be compromised? regulation of pH What is tissue thromboplastin? A compound released by damaged tissue that initiates the extrinsic clotting pathway A deficiency of which of the following stem cells would result in a marked increase in the clotting time of blood? megakaryoblast Macrophages are derived from monocytes Which of the following events is one of the three main stages of coagulation? conversion of fibrinogen to fibrin The "pacemaker" of the heart is the SA node Where is blood moving during the period of ejection? Ventricles to great vessels The adult heart averages ___________ grams. 250-300 The epicardium covers the surface of the heart. Energy for contraction of myocardial cells comes primarily from aerobic respiration in the mitochondria What event(s) occur during the QRS complex of an ECG? depolarization of the ventricles and repolarization of the atria The relationship between preload and stroke volume is known as Starling Law of the heart. Cardiac muscle cells are maintained by an extensive capillary network. During the isovolumetric contraction period of the cardiac cycle, AV and semilunar valves are closed. Pressure in the right ventricle must exceed pressure in the ____ before the right ventricle can eject blood. pulmonary trunk In the cardiac cycle, all four chambers of the heart are in diastole at the same time. What cardiac arrhythmia will have no QRS complex as a symptom? ventricular fibrillation Which of the following is administered to the people suffering from myocardial infarction following onset of symptoms? Tissue plasminogen activator (t-PA) Which of the following might increase the risk for cardiovascular disease? chronic stress Aortic stenosis results from a narrowed opening through the aortic valve An incompetent pulmonary semilunar valve could result in less