The transmembrane domain of an integral membrane protein is called

hydrophobic core or membrane spanning domain

Explanation:

Integral Membrane Proteins:

* The attached image illustrates the structure of a transmembrane protein, glyphorin A from RBC plasma membrane.

*Source: V. T. Marchesi, H. Furthmayr, and M. Tomita, 1976, Ann. Rev. Biochem. 45:667; A. H. Ross et al., 1982, J. Biol. Chem. 257:4152.

other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations. the si derived unitsfor these derived quantities are obtained from these equations and the seven si base units.