Membrane Transport & Tonicity

Front

What does selective permeability mean in the context of cell membranes?

Back

Selective permeability means that some substances can pass through the membrane while others are kept out.

Front

In a hypotonic solution, which way does water move in relation to the cell?

Back

Water moves into the cell, causing the cell to swell.

Front

What happens to a cell in a hypertonic solution?

Back

Water moves out of the cell, causing the cell to shrink.

Front

What is equilibrium in terms of water movement in and out of a cell?

Back

Equilibrium is the state where the amount of water inside and outside the cell is equal.

Front

What method do O2 and CO2 use to pass through the cell membrane?

Back

O2 and CO2 pass through the cell membrane using simple diffusion.

Front

Define osmosis in the context of membrane transport.

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 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 and moves substances along their concentration gradient.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, leading to water moving out of the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, leading to water moving into the cell.

Front

What role do transport proteins play in membrane transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.