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Blood Exam

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Submitted By jcolossi
Words 883
Pages 4
1) ________ is a pivotal molecule associated with the external surfaces of aggregated platelets and is involved in the intrinsic and extrinsic mechanisms of blood clotting.

A) PGI2
B) PF3
C) Thrombin
D) Thromboplastin (prothrombin activator)
Answer: B
2.
2) What is the average normal pH of blood?

A) 8.4
B) 7.8
C) 7.4
D) 4.7
Answer: C
3.
3) The special type of hemoglobin present in fetal red blood cells is ________.

A) hemoglobin A
B) hemoglobin B
C) hemoglobin F
D) hemoglobin S
Answer: C
4.
4) Together, leukocytes and platelets comprise approximately ________ percent of total blood volume. A) 1
B) 75
C) 45
D) 10
Answer: A
5.
5) Which blood type is called the universal donor?

A) A
B) B
C) AB
D) O
Answer: D
6.
6) Which of the following is a regulatory function of blood?

A) delivery of oxygen to body cells
B) transport of metabolic wastes from cells
C) prevention of blood loss
D) maintenance of normal pH in body tissues
Answer: D
7.
7) Which of the following is a protective function of blood?

A) prevention of blood loss
B) maintenance of adequate fluid volume
C) maintenance of normal pH in body tissue
D) maintenance of body temperature
Answer: A
8.
8) Which of the following is not a phase of erythropoiesis?

A) production of ribosomes
B) synthesis of hemoglobin
C) ejection of the erythrocyte nucleus
D) production of vacuoles
Answer: D reference page 639
9.
9) Which of the following might trigger erythropoiesis?

A) hypoxia of EPO-producing cells
B) decreased tissue demand for oxygen
C) an increased number of RBCs
D) moving to a lower altitude
Answer: A
10.
10) As red blood cells age ________.

A) ATP production increases
B) membranes ʺwear outʺ and the cells become damaged
C) they will eventually be excreted by the digestive system
D) iron

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