Cell Membrane and Cell Transport

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in materials by engulfing them in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.

Front

What does the term 'hydrophobic' mean in relation to cell membranes?

Back

Hydrophobic refers to the 'water-fearing' nature of the tails of phospholipids in the cell membrane.

Front

What is the Fluid Mosaic Model?

Back

The Fluid Mosaic Model describes the cell membrane as a flexible structure with various proteins embedded in or attached to a phospholipid bilayer.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across the cell membrane via specific transmembrane integral proteins.

Front

How does the cell membrane maintain homeostasis?

Back

The cell membrane maintains homeostasis by controlling the movement of substances in and out of the cell.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.