Cell Transport Amoeba sisters

Front

What is the role of the cell membrane in maintaining homeostasis?

Back

The cell membrane controls what enters and leaves the cell, thus maintaining a stable internal environment.

Front

What process do cells use to transport glucose when extracellular concentration is lower than intracellular concentration?

Back

Active transport is used to move glucose into the cell against its concentration gradient.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels large molecules by enclosing them in a vesicle that fuses with the cell membrane.

Front

What are polar heads in a phospholipid bilayer?

Back

Polar heads are hydrophilic (water-attracting) parts of phospholipids that face outward towards the water inside and outside the cell.

Front

What is facilitated diffusion?

Back

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

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their gradient.

Front

What is osmosis?

Back

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

Front

What is the function of transport proteins in the cell membrane?

Back

Transport proteins help move substances across the cell membrane, either by facilitating passive transport or by actively transporting molecules.

Front

What is the significance of the fluid mosaic model of the cell membrane?

Back

The fluid mosaic model describes the cell membrane as a dynamic structure with various proteins floating in or on the fluid lipid bilayer, allowing for flexibility and movement.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle formed from the cell membrane.