OCC BIO 1511 - Chapter 5 Membranes

These flashcards are designed to help students review key vocabulary and concepts from Chapter 5 on Membranes in the OCC BIO 1511 course.

Phospholipid Bilayer

A double layer of phospholipids that makes up the cell membrane, providing a barrier to most water-soluble substances.

Fluid Mosaic Model

A model that describes the structure of cell membranes as a mosaic of various proteins that float in or on the fluid lipid bilayer.

Membrane Protein

Proteins that are associated with or embedded in the cell membrane, playing key roles in transport, signaling, and structure.

Passive Transport

The movement of molecules across the cell membrane without the need for energy input.

Active Transport

The movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Diffusion

The process by which molecules spread from areas of high concentration to areas of low concentration.

Osmosis

The diffusion of water across a selectively permeable membrane.

Endocytosis

The process by which cells engulf materials from the outside by folding the cell membrane inward.

Exocytosis

The process of vesicles fusing with the plasma membrane to release their contents outside the cell.

Selectively Permeable

A property of cell membranes that allows certain molecules to pass through while blocking others.