The region indicated by the arrow plasma membrane, (D).
What is plasma membrane?
The plasma membrane is the outermost layer of a cell that separates the internal contents of the cell from the external environment. It is a selectively permeable barrier that allows certain substances to enter and exit the cell while restricting others.
The other options, ions, cellular matrix, and channels, are all components of the cell that have specific functions. Ions are charged particles that are found in the cytoplasm and extracellular fluid. The cellular matrix is a network of fibers and proteins that provides structural support for the cell. Channels are proteins that form pores in the plasma membrane, allowing specific substances to pass through.
Complete question:
what is the region indicated by the arrow? group of answer choices ions cellular matrix channel plasma membrane