Shoe Inserts and Prescription Custom Orthotics. You've seen them at the grocery store and at the mall. You've probably even seen them on TV and online. Shoe inserts are any kind of non-prescription foot support designed to be worn inside a shoe. Pre-packaged arch supports are shoe inserts. So are the âcustom-madeâ insoles and foot supports that you can order online or at retail stores. Unless the device has been prescribed by a doctor and crafted for your specific foot, it's a shoe insert, not a custom orthotic deviceâdespite what the ads might say.
The membrane of a cell is basically made up of a mixture of lipids  and proteins. The other components of a membrane of a cell are  phospholipids and glycoproteins.3 people found this useful.ost of the cell membrane are made up of proteins and  phospholipids. The phospholipids make up the basic cell body, with  tiny holes scattered around. It is not a solid pie â¦ ce.
Eukaryotic cells contain a nucleus and membrane-bound organelles. All multicellular organisms consist of eukaryotic cells. Eukaryotic cells are thought to have evolved from primitive single-celled prokaryotic cells. All cells are surrounded by a cell membrane (plasma membrane). The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others. It is composed of a double layer of phospholipids and embedded proteins. Plant cells have an additional layer surrounding them called the cell wall. The cell wall is made of nonliving material called cellulose. The centrosome (also called the microtubule organizing center) is a small body located near the nucleus. The centrosome is where microtubules are made.