FREE DNB MCQ on 31 December 2016

DNB
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 DAILY FREE MCQ CHALLENGE for Medical PG Preparation

Question
Chromaffin cells are seen in which among the following?

A. Adrenal
B. Liver
C. Thymus
D. Kidney

TIPSImportant Question from DNB 2015

 Answer: A. Adrenal

Explanation :

Adrenal Medulla:

    • The adrenal medulla is composed of large, pale-staining polyhedral cells arranged in cords or clumps and supported by a reticular fiber network.
    • A profuse supply of sinusoidal capillaries intervenes between adjacent cords and a few parasympathetic ganglion cells are present.
    • Medullary parenchymal cells, known as chromaffin cells, arise from neural crest cells, as do the postganglionic neurons of sympathetic and parasympathetic ganglia.
    • Chromaffin cells can be considered modified sympathetic postganglionic neurons, lacking axons and dendrites and specialized as secretory cells.

 

Reference:  Mescher AL. Endocrine Glands. In: Mescher AL. eds. Junqueira’s Basic Histology, 14e. Reference link


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