A & P 2 Straighterline Final Exam- Questions and Answers 100% Pass

A & P 2 Straighterline Final Exam- Questions and Answers 100% Pass When erythrocytes are destroyed, which of the following events occurs? - ANSWER-The globin portion of the molecule is broken down into amino acids. Type AB blood - ANSWER-has both A and B antigens on the red cells In the platelet release reaction, - ANSWER-ADP and thromboxanes stimulate other platelets to become activated. The hematocrit is - ANSWER-d. the percentage of RBCs in a given volume of blood. What vitamin is necessary to produce many clotting factors in the liver? - ANSWER-Vitamin K A white blood cell engulfing a bacterium is an example of blood functioning in - ANSWER-a. protection. Copyright ©EMILLECT 2024. ALL RIGHTS RESERVED. Page 2/57 The oxygenated form of hemoglobin is called - ANSWER- oxyhemoglobin The only formed elements that possess a nucleus when mature are the - ANSWER-c. leukocytes Plasma - ANSWER-. is the liquid matrix of the blood. An increased amount of heparin in the blood might - ANSWER-. prevent clotting process. On which chromosome is there a mutation that leads to sickle cell anemia? - ANSWER-b. chromosome 11 Blood consists of a matrix of plasma and cells; blood is a subtype of ______ tissue. - ANSWER-e. connective The ability of white blood cells to leave the circulation and enter tissues is called - ANSWER-b. diapedesis. The nervous system and certain chemicals can cause the constriction of a blood vessel. This is known as - ANSWER-b. vascular spasm Copyright ©EMILLECT 2024. ALL RIGHTS RESERVED. Page 3/57 The cascade of events in the intrinsic pathway can be set into motion when _____ comes into contact with collagen. - ANSWER-factor XII If a blood buffer is absent, what function of the blood would be compromised? - ANSWER-regulation of pH What is tissue thromboplastin? - ANSWER-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? - ANSWER-megakaryoblast Macrophages are derived from - ANSWER-monocytes Which of the following events is one of the three main stages of coagulation? - ANSWER-conversion of fibrinogen to fibrin The "pacemaker" of the heart is the - ANSWER-SA node Where is blood moving during the period of ejection? - ANSWER- Ventricles to great vessels The adult heart averages ___________ grams. - ANSWER-250-300 The epicardium - ANSWER-covers the surface of the heart. Copyright ©EMILLECT 2024. ALL RIGHTS RESERVED. Page 4/57 Energy for contraction of myocardial cells comes primarily from - ANSWER-aerobic respiration in the mitochondria What event(s) occur during the QRS complex of an ECG? - ANSWER- depolarization of the ventricles and repolarization of the atria The relationship between preload and stroke volume is known as - ANSWER-Starling Law of the heart. Cardiac muscle cells - ANSWER-are maintained by an extensive capillary network. During the isovolumetric contraction period of the cardiac cycle, - ANSWER-AV and semilunar valves are closed. Pressure in the right ventricle must exceed pressure in the ____ before the right ventricle can eject blood. - ANSWER-pulmonary trunk In the cardiac cycle, - ANSWER-all four chambers of the heart are in diastole at the same time. What cardiac arrhythmia will have no QRS complex as a symptom? - ANSWER-ventricular fibrillation Copyright ©EMILLECT 2024. ALL RIGHTS RESERVED. Page 5/57 Which of the following is administered to the people suffering from myocardial infarction following onset of symptoms? - ANSWER-Tissue plasminogen activator (t-PA) Which of the following might increase the risk for cardiovascular disease? - ANSWER-chronic stress Aortic stenosis results from - ANSWER-a narrowed opening through the aortic valve An incompetent pulmonary semilunar valve could result in less blood reaching the - ANSWER-lungs