The components of cell membranes that are embedded within the membrane and exposed to both the inside and outside of the cell are transmembrane proteins.

Here's why:

* Embedded within the membrane: Transmembrane proteins have a hydrophobic region that interacts with the hydrophobic tails of the phospholipid bilayer, allowing them to be embedded within the membrane.

* Exposed to both inside and outside: They have hydrophilic regions that extend into the aqueous environments on both sides of the membrane, the intracellular and extracellular fluids.

This unique structure allows transmembrane proteins to act as:

* Channels: Facilitating the passage of specific molecules across the membrane.

* Transporters: Actively moving molecules across the membrane, often against their concentration gradient.

* Receptors: Binding to signaling molecules and triggering cellular responses.

* Anchors: Providing structural support and connecting the cell membrane to the cytoskeleton.

Let me know if you'd like more details about any of these functions!