The electron microscopic studies reveal that a typical cell/plasma membrane is 75-100 Ao (7.5-10.0 nm) in thickness.

The thickness of the cell membrane is approximately 7-10 nanometers. The cell membrane is a crucial component of all living cells as it acts as a protective barrier, regulating the movement of substances in and out of the cell. It is composed of a lipid bilayer with embedded proteins and other molecules.

- **Cell Membrane Structure:**
The cell membrane is made up of a double layer of phospholipids arranged in a bilayer. Each phospholipid molecule has a hydrophilic (water-loving) head and hydrophobic (water-fearing) tails. These phospholipids arrange themselves in such a way that the hydrophilic heads face outward towards the extracellular fluid and the cytoplasm, while the hydrophobic tails face inward, creating a barrier.

- **Membrane Proteins:**
Embedded within the lipid bilayer are various types of proteins. Integral proteins span the entire width of the membrane, while peripheral proteins are attached to the inner or outer surface of the membrane. These proteins have various functions, such as transporting molecules across the membrane, acting as receptors for cell signaling, and providing structural support.

- **Membrane Fluidity:**
The cell membrane is not a rigid structure but rather a fluid mosaic. The lipid bilayer allows for the movement of phospholipids and proteins within the membrane. This fluidity is essential for the functioning of the membrane and its ability to respond to external stimuli.

- **Measuring Membrane Thickness:**
The thickness of the cell membrane can be measured using various techniques, such as electron microscopy. Electron microscopy allows scientists to visualize and measure structures at the nanometer scale. Through these methods, it has been determined that the average thickness of the cell membrane is between 7-10 nanometers.

- **Importance of Membrane Thickness:**
The thickness of the cell membrane is crucial for its function. The lipid bilayer provides a barrier that prevents the passage of certain molecules, while allowing others to pass through. The thickness of the membrane ensures that it is not too permeable, maintaining the integrity of the cell and its internal environment.

In conclusion, the thickness of the cell membrane is approximately 7-10 nanometers. This measurement is essential for understanding the structure and function of the cell membrane, which plays a vital role in maintaining the homeostasis of living cells.

Yes it is c ....as we know cell membrane is really very thin....and 1stly know what is cell membrane ..cell membrane is the outer most covering of the cell ...and it is composed up of lipids,fats,phospholipids,sterids and colestrole.......it is called semi permiable membrane.... and one thing is left here that they r found both in an Animal cell and In an Plant cell.................................😊😊😊😊😊....…...