موضوع: Multiple choice questions with their answers on blood physiology الإثنين نوفمبر 15, 2010 12:43 pm
1. Which of the following functions is associated with the blood? A) delivery of oxygen to tissue cells B) transport of digestive enzymes to the small intestine C) maintenance of DNA content of egg cells D) transport of neurotransmitters across synapses E) electrical stimulation of the heart
2. Which of the following plasma proteins is most abundant? A) albumin B) globulins C) fibrinogen D) immunoglobulins E) hemoglobin
3. Plasma A) is one of the formed elements. B) is the liquid matrix of the blood. C) transports waste products but not nutrients. D) accounts for less than half of the blood volume. E) is serum plus formed elements.
4. The only formed elements that possess a nucleus when mature are the A) thrombocytes. B) erythrocytes. C) leukocytes. D) platelets. E) RBCs.
5. Stem cells A) are specialized cells. B) are found in yellow bone marrow. C) form branches of trees. D) are abundant in the plasma. E) give rise to formed elements in the blood.
6. Neutrophils of the blood are derived from a population of stem cells called A) lymphoblasts. B) proerythroblasts. C) myeloblasts. D) megakaryoblasts. E) monoblast
7. Which of the following phrases is least likely to be used in describing erythrocytes? A) biconcave cells B) cells can change shape C) cytoplasm contains hemoglobin D) nucleus is centrally located E) cannot undergo mitosis
8. Mature erythrocytes A) have a centrally located nucleus. B) are actually just cellular fragments. C) contain hemoglobin in their cytoplasm. D) mature from cells called megakaryocytes. E ) do not contain protein.
9. Hemoglobin A) gives white blood cells their color. B) transports oxygen in the blood. C) is normally found in both the plasma and erythrocytes. D) catalyzes the reaction that forms carbonic acid. E) is only used once then decomposed.
10. Each hemoglobin molecule A) has one heme group. B) contains two polypeptide chains. C) transports four oxygen molecules. D) has two iron atoms and two globin chains. E) transports one oxygen molecule.
11. Which of the following would lead to increased erythropoiesis? A) increased environmental O2 levels B) increased erythropoietin levels C) increased blood pH D) increased blood pressure E) increased CO2 levels
12. Erythropoietin A) is a product of the kidney. B) inhibits the production of erythrocytes. C) is produced in response to increased blood pressure. D) is found both in the plasma and inside red blood cells. E) is produced by the red bone marrow.
13. When a person develops a sore throat, white blood cells are drawn to the area of infection by a process called A) chemotaxis. B) diapedesis. C) margination. D) ameboid movement. E) attraction.
14. Macrophages are derived from A) neutrophils. B) lymphocytes. C) monocytes. D) basophils. E) eosinophils.
15. Which of the following is a stage of hemostasis? A) coagulation. B) erythropoiesis. C) platelet formation. D) vascular dilation. E) agglutination
16. Which of the following events is one of the three main stages of coagulation? A) conversion of fibrinogen to fibrin B) platelet aggregation C) conversion of thrombin to prothrombin D) platelet plug formation E) calcium is released
17. A blood clot attached to a blood vessel wall is called a(an) A) thrombus. B) embolus. C) prostacylin. D) hemorrhage. E) anticoagulant.
18. Type AB blood A) has no antigens on the red cells. B) has O antigens on the red cells. C) has both A and B antigens on the red cells. D) has both a and b antibodies on the red cells. E) has both a and b antibodies in the plasma.
19. A person with type O blood should receive a blood transfusion from a donor with A) type A blood. B) type B blood. C) type O blood. D) type AB blood. E) type A or type B
20. A person with type B blood A) has antigen A. B) has antibody a. C) will have a transfusion reaction if given type B blood. D) has antibody b. E) can receive type A blood.
21. The hematocrit is A) an estimate of blood flow/hour. B) the number of WBCs per mm3. C) the amount of hemoglobin by weight in the blood. D) the percentage of RBCs in a given volume of blood. E) the number of RBCs in the body.
22. In which of the following situations might Rh incompatibility develop? A) Mother is Rh negative; fetus is Rh negative B) Mother is Rh positive; father is Rh positive C) Mother is Rh negative; fetus is Rh positive D) Mother is Rh positive; fetus is Rh negative E) Mother is Rh positive; fetus is Rh positive
For questions 23 to 27 match the following components of blood plasma with the appropriate description. A) the suspending medium for blood components B) the most abundant plasma protein C) a protein that functions in clotting D) a plasma protein that is involved in immunity E) involved in osmosis, membrane potentials, and acid-base balance
23. albumin 24. globulin 25. Fibrinogen 26. water 27. ions