In this task, you will be given sentences in which you have to recognize the name of the body cells. A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Although there might be several correct answers, you need to write one of them.

Q:  The authors have used reverse transcription / polymerase chain reactions to accomplish a comprehensive examination of the RNA expression for 58 distinct mammalian protein tyrosine and dual specificity phosphatase ( PTPase ) and PTPase - like genes in the normal human diploid fibroblast cell line WI - 38 .

A: fibroblast
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Q:  ( C ) Confocal images of C - terminally MYC - tagged MOR1 or FLAG - tagged MOR1K overexpressed in HEK293 cells and stained with either Anti - MYC - Tag Antibody ( Alexa Fluor 647 Conjugate ) or Anti - DYKDDDDK Tag Antibody ( Alexa Fluor 555 conjugate ) .

A: HEK293 cells
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Q:  Further , the almost identical distribution of the 5 - HT1A and 5 - HT7 messengers ribonucleic acid indicate that the receptors may be co - localized in epithelial cells .

A:
epithelial cells
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