Cell Membrane

Front

What are the two main functions of proteins in the cell membrane?

Back

1.) Act as gatekeepers, allowing only certain substances to enter. 2.) Serve as enzyme receptors embedded in the membrane.

Front

What process do cells use to release large molecules?

Back

Exocytosis.

Front

What is the primary function of the plasma membrane?

Back

To regulate what enters and leaves the cell.

Front

What component in the plasma membrane prevents fatty acid tails from sticking together?

Back

Cholesterol.

Front

What type of passive transport involves the movement of molecules through a membrane via a protein channel?

Back

Facilitated Diffusion.

Front

What are phospholipids and their role in the cell membrane?

Back

Phospholipids are molecules that form the basic structure of the cell membrane, creating a bilayer that is semi-permeable.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is the difference between endocytosis and exocytosis?

Back

Endocytosis is the process of taking substances into the cell, while exocytosis is the process of releasing substances from the cell.

Front

What role do carbohydrates play in the cell membrane?

Back

Carbohydrates are involved in cell recognition and communication, often attached to proteins or lipids.

Front

What is the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a mosaic of various components (lipids, proteins, carbohydrates) that move fluidly within the layer.