EXAM 2 - Cell Membrane

What molecules make up the cell membrane?

Phospholipids and proteins

Concentration gradient:

high concentration to low concentration

Diffusion:

The movement of molecules from an area of high concentration to an area of lower concentration

• passive transport

Flaccid:

When a plant cell becomes isotonic, an equal amount of water and solute is leaving the cell, making the cell/plant wilt.

Pinocytosis:

A type of endocytosis where the cell takes in liquids

Phagocytosis:

Type of endocytosis where the cell takes in food

Turgid:

When a cell is in a hypotonic solution, the plant cell swells which applies pressure to the cell wall

Osmosis:

The movement of water molecules across a SELECTIVELY PERMEABLE membrane from an area of high concentration of water molecules to an area of lower concentration of water molecules.

• passive transport

Lysed:

When an animal cell fills with water and bursts

Hypertonic:

Higher solute than solution (water). If you place a cell in this solution, water will leave

Exocytosis:

When cells release matter to the outside by enclosing the matter into a membrane-bound vescile.

Plasmolyzed:

When placing a plant cell in a hypertonic solution, the cell membrane will collapse. However the rigid cell wall remains intact.

Isotonic:

When water flows in and out of a cell at an equal rate

Facilitated diffusion