Cell Membrane and Transport Mechanisms

Flashcards covering key concepts about cell membranes and transport mechanisms.

What are the two layers of the cell membrane called?

Phospholipid bilayer.

What type of molecules can pass through the cell membrane easily?

Nonpolar molecules.

What are the two main types of membrane proteins mentioned?

Enzymes and cell recognition proteins.

Define selective permeability in the context of cell membranes.

It allows nonpolar molecules to pass, while polar molecules and ions cannot pass easily.

What process describes the movement of water across a membrane?

Osmosis.

What happens in an isotonic solution regarding water movement?

There is no net movement of water between the solution and the cell.

In a hypertonic solution, where does water move?

Water moves out of the cell.

What is the process called when a cell engulfs solid particles?

Phagocytosis.

What is the direction of movement in active transport?

From low concentration to high concentration.

What cellular process involves vesicles fusing with the membrane to release molecules?

Exocytosis.