Cell membranes are made up of a phospholipid bilayer with proteins embedded throughout. The phospholipid bilayer consists of two layers of phospholipid molecules, with the hydrophobic tails facing inward and the hydrophilic heads facing outward.
The proteins embedded in the cell membrane can have various functions, such as transport of molecules in and out of the cell, cell signaling, cell recognition, and structural support. There are two types of proteins in the cell membrane: integral proteins which span the entire membrane and peripheral proteins which are only found on one side of the membrane.
The structure of the cell membrane allows it to be selectively permeable, meaning that it allows certain molecules to pass through while blocking others. This is crucial for maintaining the internal environment of the cell and ensuring that it functions properly.
Cell membranes also play a key role in cell signaling, as they contain receptors that can bind to specific molecules, such as hormones or neurotransmitters, and trigger a response within the cell.
Overall, the cell membrane is essential for the survival and functioning of cells, as it regulates what enters and exits the cell, supports cell signaling, and provides structural support.
Describe the structure, characteristics and functions of cell membranes
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