Adv. Cell Membrane and Cell Transport

Front

What is osmosis?

Back

Osmosis is the movement 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 primary component of all cell membranes?

Back

The primary component of all cell membranes is the plasma membrane, which is made up of a lipid bilayer.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is exocytosis?

Back

Exocytosis is a type of active transport where materials are expelled from the cell through vesicles that fuse with the plasma membrane.

Front

What is the function of the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, maintaining cellular homeostasis.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell loses water and shrinks due to the higher concentration of solutes outside the cell.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What are lipids?

Back

Lipids are a group of organic compounds that are insoluble in water and are a major component of cell membranes.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane serve various functions, including transport, acting as channels or carriers, and facilitating communication between the cell and its environment.