PHYS 261 MIDTERM EXAM QUESTIONS AND ANSWERS 2023

PHYS 261 MIDTERM EXAM QUESTIONS AND ANSWERS 2023. The process of fibrinolysis A) activates fibrinogen. B) draws torn edges of damaged tissue closer together. C) dissolves clots. D) forms emboli. E) forms thrombi. Answer: C 25) A hematocrit is used to indicate A) only the ratio of red blood cells to the total blood volume. B) only the packed cell volume. C) only coagulation time. D) the ratio of red blood cells to the total blood volume and the packed cell volume. E) All of the answers are correct. Answer: D 28) The percentage of whole blood occupied by red blood cells is the A) viscosity. B) specific gravity. C) pH. D) hematocrit. E) differential cell count. Answer: D 37) Platelets are A) large cells that lack a nucleus. B) small cells that lack a nucleus. C) large cells with a prominent, indented nucleus. D) small cells with a many-shaped nucleus. E) fragments of large cells. Answer: E 2) Plasma is mostly A) water. B) blood cells. C) proteins. D) organic molecules. E) ions. Answer: A Section: Plasma and the Cellular Elements of Blood Learning Outcome: 16.1 Bloom's Taxonomy: Knowledge 3) The most abundant proteins in blood plasma are A) globulins. B) transport proteins. C) albumins. D) lipoproteins. E) fibrinogens. Answer: C A. albumins B. globulins C. fibrinogen D. transferrin E. antibodies 43) contribute(s) significantly to osmotic pressure of plasma Answer: A 44) help(s) defend the body against germs Answer: E 45) essential to the process of blood clotting Answer: C 46) bind(s) with iron in the blood Answer: D 47) a category that includes clotting factors and enzymes Answer: B 26) A normal adult hematocrit would be approximately ________%. A) 100 B) 75 C) 66 D) 45 E) 10 Answer: D 30) The process of red blood cell production is called A) erythrocytosis. B) erythropenia. C) hemocytosis. D) erythropoiesis. E) hematopenia. Answer: D 12) Red blood cell production is regulated by the hormone A) thymosin. B) angiotensin I. C) erythropoietin. D) M-CSF. E) cobalamin. Answer: C 15) The primary organ where erythropoietin is produced is the A) liver. B) kidney. C) spleen. D) bone marrow. E) endothelial cells throughout the body. Answer: B 17) The primary stimulus for the release of erythropoietin is A) hypoxemia only. B) low oxygen levels in the tissues only. C) low blood pressure only. D) hypoxemia and low oxygen levels in the tissues. E) hypoxemia, low oxygen levels in the tissues, and low blood pressure. Answer: D 11) ________ regulates the growth and maturation of megakaryocytes. A) Erythropoietin B) Interleukin C) Thrombopoietin D) Colony-stimulating factor E) None of the answers are correct. Answer: C 13) Thrombopoietin is produced in the A) liver only. B) kidney only. C) spleen only. D) bone marrow only. E) liver and kidney. Answer: E 20) The function of red blood cells is to A) remove carbon dioxide from the lungs. B) remove nitrogenous wastes from active tissues. C) carry oxygen from the lungs to the body's cells. D) carry nutrients from the digestive system to the body's cells. E) defend the body against infectious organisms. Answer: C 36) Platelets function in A) transporting chemicals important for clotting. B) forming temporary patches in injured areas. C) contraction after clot formation. D) initiating the clotting process. E) All of the answers are correct. Answer: E 19) The average life span of a red blood cell is A) 1 week. B) 1 month. C) 4 months. D) 6 months. E) 1 year. Answer: C 14) In normal adults, red blood cells are formed in A) the liver. B) the spleen. C) red bone marrow. D) yellow bone marrow. E) lymph nodes. Answer: C 12) Red blood cell production is regulated by the hormone A) thymosin. B) angiotensin I. C) erythropoietin. D) M-CSF. E) cobalamin. Answer: C 20) The function of red blood cells is to A) remove carbon dioxide from the lungs. B) remove nitrogenous wastes from active tissues. C) carry oxygen from the lungs to the body's cells. D) carry nutrients from the digestive system to the body's cells. E) defend the body against infectious organisms.