2012 AIPMT-MAINS Structural Organisation in AnimalsConnective tissue Medium Question 3 of 8 in Connective tissue

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C…

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D, and select the right option about them.
A A – Mast cell, B – Collagen fibres, C – Fibroblast, D – Macrophage
B A – Macrophage, B – Fibroblast, C – Collagen fibres, D – Mast cell
C A – Mast cell, B – Macrophage, C – Fibroblast, D – Collagen fibres
D A – Macrophage, B – Collagen fibres, C – Fibroblast, D – Mast cell

The answer is B.

Solution

The sketch is of areolar tissue, a loose connective tissue present beneath the skin, with cells and fibres loosely arranged in a semi-fluid ground substance.
A is a macrophage: a large irregular cell that engulfs foreign particles.
B is a fibroblast: a flattened, spindle-shaped cell with processes that produces and secretes the fibres.
C represents collagen fibres: wavy bundles of fibres running through the matrix.
D is a mast cell: a rounded cell packed with granules that releases histamine and heparin.
So A is macrophage, B is fibroblast, C is collagen fibres and D is mast cell.

Concept Areolar tissue

Connective tissue in past papers

8 questions from this chapter have appeared across 7 exam years.