Question

1. Cell Membrane Structure and Function
• The cell membrane is composed of a ____________ bilayer with embedded proteins.
o Functions of membrane proteins include
▪ ___________________________________________________
▪ ___________________________________________________
▪ ___________________________________________________
▪ ___________________________________________________
▪ ___________________________________________________
▪ ___________________________________________________
o Other components of the plasma membrane include
▪ _________________, which controls membrane fluidity
▪ _________________, found on the extracellular surface of the plasma
membrane attached to proteins or phospholipids that
• Functions of the plasma membrane:
o Selective permeability,
o Cell recognition,
o Cell communication.
o Defines cell boundaries
o Structural Support

Answer 1

1. Cell Membrane Structure and Function
• The cell membrane is composed of a **phospholipid** bilayer with embedded proteins.
o Functions of membrane proteins include
▪ **Transport of substances across the membrane (channels and carriers)**
▪ **Receptor functions (binding of signaling molecules)**
▪ **Enzymatic activity (catalyzing chemical reactions)**
▪ **Cell adhesion (anchoring to other cells or the extracellular matrix)**
▪ **Cell signaling (transmitting information into the cell)**
▪ **Structural support (maintaining the shape of the cell and interacting with the cytoskeleton)**
o Other components of the plasma membrane include
▪ **Cholesterol**, which controls membrane fluidity
▪ **Glycocalyx**, found on the extracellular surface of the plasma membrane attached to proteins or phospholipids that
• **Functions of the plasma membrane:**
o Selective permeability,
o Cell recognition,
o Cell communication,
o Defines cell boundaries,
o Structural support.