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Practice Quiz for Blood Components 1. Which of the following statements is true concerning human blood? a) The blood of all normal humans contains red and white cells, platelets, and plasma. b) Some human populations normally lack the ability to produce plasma. c) Proteins are not normal components of human blood. Answer: a) The blood of all normal humans contains red and white cells, platelets, and plasma. ## CORRECT --> There are no populational or regional differences. All healthy people produce these 4 main blood components. 2. Erythrocyte is another name for a: a) red cell b) white cell c) platelet Answer: a) red cell ## CORRECT --> Erythrocyte literally means red cell in Greek. 3. Which of the following blood components provide the major defense for our bodies against invading bacteria and viruses? a) red cells b) white cells c) platelets Answer: b) white cells ## CORRECT --> There are numerous types of white cells, many of which function to seek out and destroy alien microbes in our bodies. Some other types of white cells have the function of getting rid of old unneeded blood cells. 4. The relatively clear liquid medium which carries the other cells of blood is called: a) lipid b) antibody c) plasma Answer: c) plasma ## CORRECT --> Most of blood`s volume is made up of plasma. As the heart pumps blood to cells throughout the body, the plasma brings them nourishment and removes the waste products of metabolism. It also transports the red and white cells as well as the platelets. 5. Which of the following are likely to increase in quantities when the body is under attack from bacteria? a) erythrocytes b) leukocytes c) thrombocytes Answer:b) leukocytes ## CORRECT --> In response to such an attack, the leukocytes, or white cells, normally appear at the site of infections in increasing numbers. They attack the invading bacteria and ultimately get rid of them if they are successful. 6. When blood clumps or forms visible islands in the still liquid plasma, it is called: a) clotting b) agglutination c) none of the above Answer: b) agglutination ## CORRECT --> Agglutination is the result of red cells being stuck together by antibodies attaching on to antigens on the alien red cells. Within the body, this recognition-rejection process results in the bursting of alien red cells rather than agglutination. 7. Antigens are: a) found on the surface of red cells b) kinds of red cells that identify a blood type c) relatively large carbohydrate molecules d) a and b Answer: a) found on the surface of red cells ## CORRECT --> They are relatively large molecules that identify a blood type. Each antigen type has unique traits that, in a sense, make it like a lock that only a specific antibody key can fit. 8. Which of the following statements is true of antigen-antibody interactions? a) They are used by our bodies only to identify blood types. b) They are used to identify and reject microorganisms, such as viruses and bacteria, that invade our bodies. c) They are the way our blood clots when we are bleeding from an open wound. d) b and c Answer: b) They are used to identify and reject microorganisms, such as viruses and bacteria, that invade our bodies. ## CORRECT --> Microorganisms carry foreign antigens on their surfaces which stimulate the production of white cell antibodies that attack the antigens as a way of getting rid of the invading parasites and subsequently develop an immunity to future attacks. 9. Most of the volume of normal human blood is composed of: a) red cells b) hemoglobin c) plasma d) white cells Correct:c) plasma ## CORRECT --> The liquid component of blood that we call plasma is the most abundant substance in blood. However, red cells are a close second. |