The cell Junctions allowing exchange of cytoplasmic molecules | MDS entrance preaparations

The cell Junctions allowing exchange of cytoplasmic molecules between two cells are called:

A.   Gap Junctions              

B.Tight Janctions
C.   Anchoring Junctions          
D. Focal Junctions

Ans. (A) Gap Junctions: “Gap junctions are a type of inter-cellular junction comprising a narrowed portion of about 3 mm. Of the inter cellular space: that contains channels or pores (2nm) composed ofhexagonal arrays of membrane spanning proteins around the central lumen (connexon) through which ions and small molecules such as most sugars, amino acids, nucleotides, vitamins, hormones and cyclic AMP.”