Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 33, Circulatory and Respiratory Systems - Assessment - 33.2 Blood and the Lymphatic System - Understand Key Concepts/Think Critically - Page 972: 16



Work Step by Step

Option a. is incorrect. Fibrins are sticky, insoluble filaments that form during the clotting process. These fibers trap blood components from escaping from a wound. Option b. is incorrect. Thrombin is the converted form of prothrombin. Thrombin is an enzyme that catalyzes a part of the clotting process. The action of thrombin is to convert fibrinogen to fibrin. Option d. is incorrect. Lymphocytes are white blood cells that have immune system functions. Option c. is correct. Platelets are formed from bone marrow cells that have divided into fragments surrounded by cell membranes. These cell fragments are part of the clotting mechanism.
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