What are cells not affected by hormones called?
How about non-target cells? I found several examples of that usage including:


A book section titled: 9.3 How are steroid hormone target cells differentiated from non-target cells?1
Containing the following line:


  Thus, estrogen will stimulate mRNA and protein synthesis in a target cell, but not in a non-target cell.

A book chapter titled: Target or non-target: Hormonal signal perception and response in the determination of cell performance2


References

1: Brown, R., Brown, R. E., &amp; Brown, R. E. (1994). An introduction to neuroendocrinology. Cambridge University Press., p. 149.
2: Osborne, D. J., &amp; Thompson, D. S. (1992). Target or non-target: hormonal signal perception and response in the determination of cell performance. In Progress in Plant Growth Regulation (pp. 237-247). Springer, Dordrecht.