Multiple ChoicePlasma accounts for _____% of all blood, and water accounts for _____% of plasma.470views22rank
Multiple ChoiceThe most numerous formed element in blood are the ____________, and their function is ____________.431views23rank
Multiple ChoiceThe percentage of blood volume occupied by erythrocytes is called the __________.3201views18rank
Multiple ChoiceOne molecule of hemoglobin can bind a maximum of __________ oxygen molecules.1700views9rank
Multiple ChoiceA major plasma protein that maintains the blood osmotic pressure is __________.2387views5rank
Multiple ChoiceMature red blood cells in the circulating blood are filled primarily with __________.1809views6rank
Multiple ChoiceThe percentage of total volume used to determine the number of erythrocytes in a blood sample is referred to as the __________.1751views4rank
Multiple ChoiceThe buffy coat that appears after a sample of blood has been centrifuged contains __________.1654views4rank
Multiple ChoiceWhich of the following factors has the greatest effect on making RBCs very efficient oxygen transporters?1788views12rank1comments
Textbook QuestionThe blood volume in an adult averages approximately a. 1 L, b. 3 L, c. 5 L, d. 7 L.281views1rank
Textbook QuestionMultiple Choice More than one choice may apply. Which would lead to increased erythropoiesis? a. Chronic bleeding ulcer b. Reduction in respiratory ventilation c. Decreased level of physical activity d. Reduced blood flow to the kidneys324views
Textbook QuestionThe hormonal stimulus that prompts red blood cell formation is a. serotonin, b. heparin, c. erythropoietin, d. thrombopoietin.279views
Textbook QuestionThe formed elements of the blood include (a) plasma, fibrin, and serum, (b) albumins, globulins, and fibrinogen, (c) WBCs, RBCs, and platelets, (d) all of these.212views
Textbook QuestionAll of the following are true of RBCs except a. biconcave disc shape, b. life span of approximately 120 days, c. contain hemoglobin, d. contain nuclei.328views
Textbook QuestionBlood temperature is approximately___ , and blood pH averages___. (a) 36 °C, 7.0, (b) 39 °C, 7.8, (c) 38 °C, 7.4, (d) 37 °C, 7.0174views
Textbook QuestionPlasma contributes approximately_____ percent of the volume of whole blood, and water accounts for percent of the plasma volume. (a) 55, 92, (b) 25, 55, (c) 92, 55, (d) 35, 72.181views
Textbook QuestionBlood proteins play an important part in a. blood clotting, b. immunity, c. maintenance of blood volume, d. all of the above.300views
Textbook QuestionSerum is (a) the same as blood plasma, (b) plasma minus the formed elements, (c) plasma minus the proteins, (d) plasma minus fibrinogen, (e) plasma minus the electrolytes161views
Textbook Questiona. List the three major categories of formed elements. b. Which is least numerous? c. Which comprise(s) the buffy coat in a hematocrit tube?247views
Textbook QuestionMultiple Choice More than one choice may apply. Plasma without the clotting proteins is called a. serum. b. whole blood. c. fibrin. d. tissue factor.209views
Textbook QuestionAlbumin a. is a blood buffer. b. helps maintain blood's osmotic pressure. c. distributes body heat. d. transports certain molecules.301views
Textbook QuestionIf you had a high hematocrit, would you expect your hemoglobin determination to be low or high? Why?407views
Textbook Questiona. Describe the process of erythropoiesis. b. What name is given to the immature cell type released to the circulation? c. How does it differ from a mature erythrocyte?305views
Textbook QuestionName as many different categories of substances carried in plasma as you can.237views
Textbook QuestionName the formed elements that arise from myeloid stem cells. Name those arising from lymphoid stem cells.333views
Textbook Questiona. Describe the appearance of platelets and state their major function. b. Why should platelets not be called 'cells'?239views
Textbook QuestionErythropoietin directly stimulates RBC formation by (a) increasing rates of mitotic divisions in erythroblasts, (b) speeding up the maturation of red blood cells, (c) accelerating the rate of hemoglobin synthesis, (d) all of these.242views
Textbook QuestionIf you had a high hematocrit, would you expect your hemoglobin determination to be high or low? Why?237views
Textbook QuestionDiscuss hemoglobin relative to its chemical structure, its function, and the color changes it undergoes during loading and unloading of oxygen.229views
Textbook QuestionA middle-aged college professor from Boston is in the Swiss Alps studying astronomy. He arrived two days ago and plans to stay the entire year. However, he notices that he is short of breath when he walks up steps and that he tires easily with any physical activity. His symptoms gradually disappear; after two months, he feels fine. Upon returning to the United States, he has a complete physical exam and is told that his erythrocyte count is higher than normal. (a) Attempt to explain this finding. (b) Will his RBC count remain at this higher-than-normal level? Why or why not?215views
Textbook QuestionWhich of the following is not a formed element of blood?a. Erythrocyteb. Leukocytec. Mast celld. Platelet192views
Textbook QuestionWhich of the following plasma proteins is responsible for osmotic pressure?a. γ-Globulinsb. Albuminc. α-Globulinsd. Clotting proteins133views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.a. Erythrocytes are biconcave discs with prominent nuclei.145views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.b. The main function of erythrocytes is to transport oxygen on the protein hemoglobin.162views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.c. Hemoglobin forms oxyhemoglobin when it binds to oxygen.140views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.d. Hemoglobin consists of two polypeptide chains bound to a heme group.148views
Textbook QuestionErythropoiesis requires stimulation from the hormone:a. thrombin.b. thrombopoietin.c. thymosin.d. erythropoietin.148views
Textbook QuestionFill in the blanks: Erythrocytes are derived from stem cells called____ , circulate in the blood for approximately _______days, and are destroyed by an organ called the ______ .158views
Textbook QuestionPlatelets are derived from cells called:a. thromboblasts.b. leukoblasts.c. megakaryocytes.d. thrombokaryocytes.152views
Textbook QuestionExplain how blood, being a liquid, enables all its components (formed elements and plasma) to perform their functions.156views
Textbook QuestionSuppose your blood is AB positive. This means that a. agglutinogens A and B are present on your red blood cells, b. there are no anti-A or anti-B antibodies in your plasma, c. your blood is Rh⁺ d. all of the above.100views
Textbook QuestionCancer patients being treated with chemotherapeutic drugs designed to destroy rapidly dividing cells are monitored closely for changes in their red and white blood counts. Why so?283views
Textbook QuestionMr. Chu has been scheduled for surgery to have his arthritic hip replaced. His surgeon tells him he must switch from aspirin to acetaminophen for pain control before his surgery. Why?163views
Textbook QuestionWhich type of antibodies does plasma contain for each of the following blood types? (a) type A, (b) type B, (c) type AB, (d) type O.80views
Textbook QuestionA difference between the A, B, and O blood types and the Rh factor is (a) Rh agglutinogens are not found on the surface of red blood cells, (b) Rh agglutinogens do not produce a cross-reaction, (c) individuals who are Rh− do not carry agglutinins to Rh factor unless they have been previously sensitized, (d) Rh agglutinogens are found free in the plasma, (e) Rh agglutinogens are found bound to plasma proteins.92views
Textbook QuestionA bone marrow biopsy of Mr. Lee, a man on long-term drug therapy, shows an abnormally high percentage of nonhematopoietic connective tissue. What condition does this indicate? If the symptoms are critical, what short-term and long-term treatments are indicated? Which treatment is he more likely to be given: infusion of whole blood or of packed red cells?185views
Textbook QuestionWhich of the following antibodies does a person with type O+ blood have in his or her plasma?a. Anti-A antibodiesb. Anti-B antibodiesc. Anti-Rh antibodiesd. Both a and b are correct.e. All of the above88views
Textbook QuestionMr. Reczkiewicz has blood type AB−. Which of the following blood types could be safely donated to Mr. Reczkiewicz, assuming he has had prior exposure to Rh+ blood? (Circle all that apply.)a. Type O+b. Type A−c. Type B−d. Type AB+e. Type O−95views
Textbook QuestionFill in the blanks: The two most clinically important groups of antigens on erythrocytes are the______and______blood groups.99views
Textbook QuestionMs. Wu, whose blood type is O−, requires a blood transfusion. Her family members volunteer to donate blood. Their blood types are as follows: her son, type B−; her husband, type B+; her daughter, type O+. Which family members could safely donate blood to Ms. Wu? Who could not? Explain.115views
Textbook QuestionPredict the effects of each of the following on systemic arterial blood pressure:c. Blood loss from a bleeding ulcer107views
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