Cell Membrane & Transport

Front

What happens to human red blood cells when exposed to a hypertonic solution, such as 3.5% sodium chloride?

Back

The red blood cell would shrink due to water moving out of the cell.

Front

What is the term for the movement of substances across cell membranes without the use of energy?

Back

Passive transport.

Front

What process do cells use to move large particles out of the cell?

Back

Exocytosis.

Front

What is the term for the ability of a cell to maintain a constant internal environment despite changes in external conditions?

Back

Homeostasis.

Front

What does 'selectively permeable' mean in the context of cell membranes?

Back

It means that the membrane allows certain substances to pass while blocking others.

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

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.

Front

What is an isotonic solution?

Back

A solution with the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What role do transport proteins play in cell membranes?

Back

They facilitate the movement of substances across the membrane.