Cell Membrane and Transport Practice

Front

What is the molecule that provides energy for active transport?

Back

ATP (Adenosine Triphosphate) is the molecule that provides energy for active transport.

Front

What does it mean when a solution is isotonic?

Back

Isotonic means that there is the same concentration of solute molecules outside the cell as inside.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules from an area of higher water concentration to an area of lower water concentration through a semipermeable membrane.

Front

What happens to a cell placed in a hypertonic solution?

Back

The cell will shrink when placed in a solution containing a high salt concentration.

Front

What is the outcome when a cell is in an isotonic solution?

Back

The mass of the cell will stay the same because the concentration of solute is equal inside and outside the cell.

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane allows certain molecules to pass through while blocking others, facilitating selective transport.

Front

What occurs during 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 a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solute compared to the inside of the cell, causing the cell to swell.