Which of the following choices is CORRECT? A. Blood platelets are products of myelocytes B. Yellow marrow is composed primarily of hematopoietic stem cells C. Formation of unstable collagen helices can result of vitamin B1 deficiency D. Worn out and old RBCS are normally destroyed in the stomach by macrophages E. IgG contains binding sites for integrins and is an important part of the ECM in connective tissue F. None of the above G. Both B and D

Which of the following choices is CORRECT? A. Blood platelets are products of myelocytes B. Yellow marrow is composed primarily of hematopoietic stem cells C. Formation of unstable collagen helices can result of vitamin B1 deficiency D. Worn out and old RBCS are normally destroyed in the stomach by macrophages E. IgG contains binding sites for integrins and is an important part of the ECM in connective tissue F. None of the above G. Both B and D

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter12: Blood

Section: Chapter Questions

Problem 9RQ

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Match the terms with their definition. _____ bone marrow a. largest artery _____ spleen b. cardiac pacemaker _____ vitamin K c. source of all blood cells _____ HDL d. inside red blood cells _____ SA node e. carries cholesterol to liver _____ erythropoietin f. hormone made by kidney _____ aorta g. lymphoid organ _____ haemoglobin h. brings blood to left atrium _____ vena cava i. cofactor for clotting factor
When a blood vessel is injured or severed, the process leading to hemostasis is initiated. The first step in this process is vascular spasm. Platelets contribute to vasospasm in small vessel beds by which of the following mechanisms? (a)Elaboration of vascular endothelial growht factor (b)Presence of actin and mysoin in platelet cytoplasm (c) Production of thromboxanne A2 (d) Release of thrombosthenin (e) Synthesis of prostaglandins
What type(s) of blood cells is (are) described with each statement? Choose from erythrocytes, leukocytes, or platelets. a. This type of blood cell has no nucleus. b. This type of blood cell survives in the bloodstream for the longest period of time. c. This type of blood cell is a key element in the immune system. d. This type of blood cell carries hemoglobin. e. This type of blood cell contains the machinery needed for clot formation.
The function of red blood cells is to Select one: A. defend the body against infectious organisms. B. carry oxygen from the cells to the lungs. C. carry carbon dioxide from the lungs to the body's cells. D. carry oxygen to the cells and then carry away carbon dioxide. E. carry nutrients from the digestive system to the body's cells.
The intrinsic clotting pathway is initiated by _________________________________________. A.Tissue factor VII B.Exposure of plasma to a negatively charged surface (ex. collagen in a wound). C. All are correct. D.None E.TF F.Tissue thromboplastin
Septic shock is life - threatening condition caused by an overwhelming a Inflammatory response d increase in serum cholestrol and LDL b drop in blood sugar e feeling of well-being c failure of blood -clotting cascade
Which of the following statements about blood cells are not correct? 1.Neutrophil is the rarest form of leukocyte present in the circulation in humans. 2.Lymphocytes, a larger leukocyte are the most abundant leukocyte type in circulation in humans. 3.Monocytes are a type of macrophages and can be identified by their typical 2 lobe appearance. 4.Platelets are larger fragments formed from the megakaryocytes in the bone marrow. 5.Leukocytes are active only in the circulation. 6.Average lifespan of leukocytes is 120 days. -Statements 1,2,4,5,6 are incorrect ---None of the mentioned statements are incorrect ---All of the mentioned statements are incorrect --Only statements 1.2.3.4 are incorrect.
The common pathway in coagulation ends with __________. a. release of PF-3 b. conversion of soluble fibrinogen to insoluble fibrin c. positive feedback of thrombin formation d. adhesion of platelets to a damaged vessel wall
Which of these proteins is normally found in the plasma and plays animportant role in maintaining the osmotic concentration of the blood?a. albumin c. platelets e. globulinsb. fibrinogen d. hemoglobin
Blood clotting is a homeostatic response. When clotting is poor, even a slight injury to a blood vessel may lead to severe blood loss. When clotting is excessive, small blood vessels in critical places in the body can become clogged leading to clots. Excessive bleeding or excessive clotting both can be dangerous. – Describe the main stages in the formation of a blood clot and evaluate the importance of specific factors example platelets, vitamin K, air and blood proteins Injured tissue – exposure of endothelial cells Narrowing (constriction) of blood vessels Activity of platelets Activity of clotting factors