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The plasma is about 50 percent water.

A) True
B) False

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Aplastic anaemia is due to intrinsic factor deficiency.

A) True
B) False

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Which of these chemicals is NOT involved in fibrinolysis


A) plasmin
B) plasminogen
C) tissue plasminogen activator
D) thrombin

E) None of the above
F) A) and D)

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Per cubic millimetre, white blood cells are more numerous than red blood cells.

A) True
B) False

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What factors influence the rate of erythrocyte production

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Answered by ExamLex AI

Answered by ExamLex AI

The rate of erythrocyte (red blood cell)...

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Which of the following is NOT found within erythrocytes


A) carbonic anhydrase
B) glycolytic enzyme
C) haemoglobin
D) mitochondria

E) A) and B)
F) B) and D)

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Which of the following leukocyte types did NOT arise from myeloid stem cells


A) neutrophils
B) eosinophils
C) basophils
D) lymphocytes

E) A) and B)
F) A) and C)

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Antibodies are gamma globulins produced by B lymphocytes.

A) True
B) False

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Which of these statements does NOT describe platelets


A) They do not adhere to normal vascular surfaces.
B) When aggregated, they release ADP, which causes other platelets to become sticky and adhere to the platelet plug.
C) They directly convert fibrinogen to fibrin.
D) They form a plug, which releases chemicals that cause the injured vessel to constrict.

E) C) and D)
F) A) and C)

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Match these blood disorders labelled a. through h. with their characteristics. (Options may be used more than once or not at all.) -premature rupture of erythrocytes


A) aplastic anaemia
B) pernicious anaemia
C) haemolytic anaemia
D) haemorrhagic anaemia
E) polycythaemia
F) leukaemia
G) neutrophilia
H) sickle cell anaemia

I) F) and H)
J) A) and G)

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Anaemia refers to a reduction in the oxygen-carrying capacity of the blood.

A) True
B) False

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Which organ removes most of the worn-out red blood cells from the circulation


A) bone marrow
B) kidney
C) pancreas
D) spleen

E) A) and D)
F) All of the above

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Match the blood cell formation terms labelled a. through e. with their correct characteristic. (Options may be used more than once or not at all.) -gives rise to all leukocytes except lymphocytes


A) thrombopoietin
B) erythropoietin
C) colony-stimulating factor
D) myeloid stem cell
E) pluripotent stem cell

F) A) and E)
G) A) and C)

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Which of these statements does NOT describe erythrocytes


A) They do not contain any organelles.
B) They may take on many different shapes.
C) They originate from the same undifferentiated pluripotent stem cells as leukocytes and platelets.
D) They live only about five days.

E) None of the above
F) All of the above

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Which of these statements describes platelets


A) They convert prothrombin to thrombin.
B) They form the meshwork upon which the erythrocytes become trapped to produce a clot.
C) They adhere and aggregate when they contact exposed collagen in the walls of a broken blood vessel.
D) They release fibrinogen once a platelet plug is formed.

E) A) and B)
F) C) and D)

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Pathogens are microorganisms that cause ____________________.

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Which of these statements describes red blood cells


A) They carry oxygen.
B) They participate in the clotting of blood.
C) They defend the body against foreign substances.
D) They always have a nucleus.

E) C) and D)
F) None of the above

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Which of these platelet counts is within the normal range


A) 100000/mm3
B) 130000/mm3
C) 250000/mm3
D) 600000/mm3

E) None of the above
F) A) and B)

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Plasma albumins help regulate the blood's osmotic pressure.

A) True
B) False

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Which of the following is NOT a possible cause of anaemia


A) dietary deficiency of folic acid
B) deficiency of intrinsic factor
C) malaria
D) living at high altitude

E) None of the above
F) All of the above

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