MW Practice Cellular Transport BIO CP

Front

What is osmosis?

Back

The movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will shrink as water moves out of the cell to the area of higher solute concentration.

Front

What is the difference between passive and active transport?

Back

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

Front

Define equilibrium in the context of cellular transport.

Back

Equilibrium occurs when the concentration of solutes is equal on both sides of a membrane, resulting in no net movement of water or solutes.

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration until evenly distributed.

Front

What is a selectively permeable membrane?

Back

A membrane that allows certain molecules or ions to pass through it by means of active or passive transport.

Front

What is the role of transport proteins in cellular transport?

Back

Transport proteins facilitate the movement of substances across a cell membrane that cannot directly diffuse through the lipid bilayer.

Front

What is the significance of the concentration gradient?

Back

The concentration gradient is the difference in concentration of a substance across a space, driving the movement of molecules during diffusion and osmosis.

Front

What occurs during active transport?

Back

Molecules are moved from an area of lower concentration to an area of higher concentration, often against the concentration gradient, using energy (ATP).

Front

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

Back

There will be no net movement of water into or out of the cell, and the cell will maintain its shape.