Erythropoietin is produced by

# Erythropoietin is produced and released by ?
A. Glomerular capillaries
B. Proximal tubular cells
C. Peritubular capillary lining cells of kidney
D. All of the above

The correct answer is C. Peritubular capillary lining cells of kidney.

Physiologic regulator of RBC production, glycoprotein hormone EPO, is produced & released by
highly specialized epithelial-like peritubular capillary lining cells within kidney.

Ref: Harrison’s 18th Ed. 448

Role of Erythropoietin

# In the absence of erythropoietin (EPO), committed erythroid progenitor cells undergo ?
A. Stunted growth
B. Halting of growth
C. Programmed cell death (apoptosis)
D. Change to other series of hematopoietic cell

The correct answer is C. Programmed cell death (apoptosis).

For RBC production, EPO is the regulatory hormone. It is required for maintenance of committed

erythroid progenitor cells which undergoes programmed cell death (apoptosis) if EPO is absent.

Ref: Harrison’s 18th Ed. 448

Painful preauricular lymphadenopathy is a feature of

# Painful preauricular lymphadenopathy is a feature of ?
A. Cat-scratch disease
B. Tularemia
C. Tuberculosis
D. Syphilis

The correct answer is B. Tularemia.

Painful preauricular lymphadenopathy is unique to tularemia and distinguishes it from catscratch

disease, tuberculosis, sporotrichosis, and syphilis. 

Ref: Harrison’s 17th Ed. 978

Tularemia, also known as rabbit fever, is an infectious disease caused by the bacterium Francisella tularensis. Symptoms may include fever, skin ulcers, and enlarged lymph nodes. Occasionally, a form that results in pneumonia or a throat infection may occur.

The bacterium is typically spread by ticks, deer flies, or contact with infected animals. It may also be spread by drinking contaminated water or breathing in contaminated dust. It does not spread directly between people. Diagnosis is by blood tests or cultures of the infected site.

Multiple Choice Questions In Conservative Dentistry - Tooth Colored Restorations

# Restoration of angle fracture of anterior teeth can be done by:
A. Amalgam
B. Composite resin
C. Glass ionomer cement
D. All of the above

# Replanted avulsed tooth can be aesthetically stabilized by:
A. Occlusal splints
B. Composite resins
C. Arch bar
D. All of the above

# The main disadvantages of composites not being recommended for class II posterior restorations are:
A. Color matching is not good
B. Lacks sufficient strength
C. Occlusal wear
D. Frequent fractures at the isthmus