cell transport section 8.3

Front

What is endocytosis?

Back

Endocytosis is the process by which cells transport molecules into the cell by engulfing them with the cell membrane.

Front

What happens to molecules during diffusion?

Back

During diffusion, molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is dynamic equilibrium in the context of diffusion?

Back

Dynamic equilibrium occurs when the concentration of molecules on both sides of a membrane is equal, resulting in continuous movement of molecules in both directions.

Front

What is an isotonic solution?

Back

An isotonic solution is one that has the same concentration of solutes as the inside of a cell, resulting in no net movement of water.

Front

What occurs to a cell placed in a hypertonic solution?

Back

A cell placed in a hypertonic solution will lose water and shrink due to the higher concentration of solutes outside the cell.

Front

What is osmosis?

Back

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

Front

What is the role of lipid carriers in cell transport?

Back

Lipid carriers help transport large or non-polar molecules across the cell membrane by facilitating their movement.

Front

What happens to algal cells in an isotonic solution when additional solutes are added?

Back

Algal cells will shrink as water moves out of the cells to balance the increased solute concentration in the solution.

Front

What is the difference between active and passive transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which specific molecules are transported across a membrane via protein channels without the use of energy.