# Each milliliter of red cells contain how much elemental iron ?
A. 1 mg
B. 2 mg
C. 3 mg
D. 4 mg
The correct answer is A. 1 mg.
Each milliliter of red cells contains 1 mg of elemental iron.
Ref: Harrison’s 18th Ed. 845
Flexural strength
# The term "flexural strength" describes a material with the ability do which of the following?
A. Be visually detectable in radiographs
B. Sustain deformation without permanent change in
size or shape
C. Resist fracture during bending
D. Resist the propagation of a crack
A. Be visually detectable in radiographs
B. Sustain deformation without permanent change in
size or shape
C. Resist fracture during bending
D. Resist the propagation of a crack
The correct answer is C. Resist fracture during bending.
Flexural strength is the ability of a material
to resist fracture while bending and is also
known as modulus of rupture, bend
strength, or fracture strength.
The transverse bending test is most
frequently employed to evaluate the flexural strength of a material using a 3-point flexural test technique.
The flexural strength gives the highest
stress experienced within the material at its
moment of rupture.
The significance of flexural strength is
commonly expressed in class V cervical
restorations.
Low tensile and high compressive strength
# A material with a low tensile strength and high compressive strength can be described as which of the following?
A. Ductile
B. Malleable
C. Resilient
D. Brittle
E. Tough
A. Ductile
B. Malleable
C. Resilient
D. Brittle
E. Tough
The correct answer is D. Brittle.
Brittle materials can be hard solid materials
that can withstand heavy compression but
not tension.
Brittle materials exhibit low tensile strength and may fracture or break instead of being deformed when under tensile stress.
Ductile materials exhibit high tensile
strength and low compressive strength,
making them capable of being drawn into
wires.
Excessive segmentation of nucleus of neutrophils
# Excessive segmentation of nucleus of neutrophils is a manifestation of ?
A. Folate or vitamin B12 deficiency
B. Iron deficiency
C. Thalassemia
D. Repeated blood transfusion
A. Folate or vitamin B12 deficiency
B. Iron deficiency
C. Thalassemia
D. Repeated blood transfusion
The correct answer is: A. Folate or vitamin B12 deficiency.
Nucleus of neutrophils normally contains up to four segments. Excessive segmentation (>5
nuclear lobes) is seen in folate or vitamin B12 deficiency & congenital neutropenia syndrome of
warts, hypogammaglobulinemia, infections & myelokathexis (WHIM).
Ref: Harrison’s 18th Ed. 473
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