Unit 3: Cells - Honors Pulse Check #2 - 24

Front

What is the definition of a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing water to move out of cells, leading to cell shrinkage.

Front

Why is it unsafe to drink sea water?

Back

Sea water is hypertonic to human cells, which means it will draw water out of the cells, leading to dehydration.

Front

What is equilibrium in the context of solutions?

Back

Equilibrium is the state in which the concentration of molecules is evenly distributed throughout a solution.

Front

Define osmosis.

Back

Osmosis is the movement of water across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink due to the higher concentration of solutes outside the cell.

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

Explain the process of diffusion.

Back

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

Front

What is the role of transport proteins in cells?

Back

Transport proteins help move substances across the cell membrane, either passively or actively.

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.

Front

What is the significance of the phospholipid bilayer in cell membranes?

Back

The phospholipid bilayer forms the fundamental structure of cell membranes, providing a barrier that separates the interior of the cell from the external environment.