Anatomy & Physiology II-Straighterline| 312 questions| with complete solutions| 57 pages

When a person is transfused with the wrong blood type a. the white cells clot. b. hemorrhaging occurs. c. fibrinogen is activated. d. the erythrocytes agglutinate. e. they bleed to death. CORRECT ANSWERS: d. the erythrocytes agglutinate. Which of the following statements regarding leukocytes is TRUE? a. Leukocytes have no nucleus. b. Leukocytes play a role in oxygen transport. c. Leukocytes are the largest of the formed elements. d. Leukocytes are only fragments of cells. e. There is only one kind of leukocyte. CORRECT ANSWERS: c. Leukocytes are the largest of the formed elements. 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. CORRECT ANSWERS: d. the percentage of RBCs in a given volume of blood During platelet plug formation, platelets release _____ and endothelial cells release ____ which lead to vasoconstriction. a. endothelin; thromboxane b. erythropoietin; thromboxane c. thromboxane; histamine d. histamine; heparin e. thromboxane; endothelin CORRECT ANSWERS: e. thromboxane; endothelin In adults, red blood cells are made in one place, spend most of their lifespan in another, and most are finally destroyed in yet another place. Which choice lists these locations in the correct chronological order? a. bone marrow; blood vessels; spleen b. bone marrow; spleen; blood vessels c. spleen; blood vessels; spleen d. blood vessels; spleen; bone marrow