Straighterline Final Exam

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