University of South Alabama

NU 545

Unit 4 Quiz

Chapter 25: Structure and Function of the Hematologic System

1)Which of the following is TRUE regarding the constituents of blood?

1. • Plasma is composed of about 10% dissolved substances and 90% water.
   • Plasma accounts for 55%-60% of blood volume
   • Serum is altered in laboratory by removing fibrinogen
2. Which component of the blood system is responsivle for the critical colloid oncotic pressure?
   • Albumin is essential for regulating the passage of water and solutes through the capillaries
   • The immune globulins are responsible for fighting infection
   • Clotting factors are responsibe for the clotting cascade and the formation of a blood clot
3. Which of the following is TRUE regarding erythrocytes?
   • Erythrocytes carry Hgb and are responsibe for tissue oxygenation. They DO NOT carry ribosomes and mitochondria; therefore, they cannot divide or synthesize proteins
   • They compromise 42%-48% of blood volume
4. Which of the following is NOT a granulocyte?
   • Neutrophils, basophils, and eosinophils are granulocytes
   • Monocytes and Macrophages are agranulocytes
5. A person develops a severe UTI. Which of the following are the predominant cells of early inflammation?
   • The neutrophil is the earliest cell of inflammation→soon after bacterial invasion or tissue injury neutrophils migrate out of the capillaries and into the inflamed site
6. A student looking at a slide notices large cells with a horseshoe shaped nucleus and no granules present. Which of the following cells are these?
   • Macrophages are larger and more active as phagocytes than monocytes
   • Lymphocytes are the primary cells of the immune response
   • Natural killer cells kills some types of virus-infected cells
7. Which of the following is TRUE regarding platelets?
   • They fragment from megakaryocytes
   • They do not have a nucleus and cannot divide
8. Which of the lymphoid organs cluster around lymphatic veins and collect interstitial fluid from tissues?
   • Lymph nodes cluster around lymphatic vessels→their fluid is collected and redistributed through the circulatory system
   • The spleen is the largest organ of the secondary lymphoid organs→it is the site of fetal hematopoiesis
   • The thymus and bone marrow are the primary lymphoid organs
9. Which of the following is NOT one of the four processes of platelet activation?
   • The four processes are adhesion, aggregation, secretion, and procoagulant activity
   • Inhibition is associated with tissue factor inhibitor and inhibits factor Xa of the clotting cascade