Need help with these questions: 42. Which of the following cells is far larger t
ID: 300481 • Letter: N
Question
Need help with these questions:
42. Which of the following cells is far larger than all the others?
a. macrophage
b. monocyte
c. large lymphocyte
d. erythrocyte
e. megakaryocyte
43. The percentage of blood volume composed of RBCs is called the
a. hemoglobin
b. hematocrit
c. hemolysis
d. hematoma
e. hemopoiesis
44. Suppose your blood was found to be AB positive. This means that:
a. antigens 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
45. Hemostasis occurs in phases that include:
a. vascular spasm
b. antibody formation
c. platelet plug formation
d. a and c only
e. all of the above
46. The function of hemoglobin is to:
a. protect the DNA of erythrocytes
b. produce red blood cells
c. produce antibodies
d. carry oxygen
47. How long do erythrocytes normally stay in circulation:
a. 10 days c. one year
b. 120 days d. only a few hours one month
48. Which of the following would be TRUE for a person with Type B blood:
a. He could donate to a Type O person
b. His own plasma contains anti-B antibodies
c. He must be Rh positive
d. He could donate blood to a Type AB person
e. He could receive blood from a Type AB person
49. Platelets initially stick to the wall of a damaged blood vessel because:
a. exposed collagen fibers make a rough surface to which the platelets are attracted
b. histamine causes vasoconstriction so that platelets can’t fit through the opening
c. fibrin threads act like glue to hold them there
d. prothrombinase alters the electrical charge of the vessel wall
50. The symptoms of hemolytic disease of the newborn occur because:
a. the baby has a faulty gene that makes its hemoglobin unable to bind oxygen
b. the baby begins making antibodies to its own A or B antigens
c. anti-Rh antibodies produced by the mother pass thru the placenta into the baby
Explanation / Answer
42. The largest blood is a monocyte which is a white blood cell. Hence, b is correct.
43. The term hematocrit is used for amount of blood occupied by RBC. Hence, b is correct.
44. If Blood group is AB, all the options are correct. Hence, d is correct .
45. Hemostatis occur is the process of stopping blood bleeder. Hence, d is correct.
46. The function of hemoglobin is to carry oxygen. Hence, d is correct.
47. RBC life is 120 days. Hence, b is correct .
48. The person can donate blood to AB blood group. Hence, option d is correct.
49. Platelets usually stick to wall of damage blood vessels because of collagen fibre. Hence, a is correct.
50. Hemolytic disease occur because of Rh antibody produced by mother. Hence, c is correct.
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