Cell Membrane & Transport

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.

Front

Define isotonic solution.

Back

An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water across the cell membrane.

Front

What happens to a cell in a hypertonic solution?

Back

A cell in a hypertonic solution will lose water and shrink due to osmosis.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing cells to gain water and swell.

Front

What is osmosis?

Back

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

Front

What role do transport proteins play in the cell membrane?

Back

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

Front

What is the significance of concentration gradients in cellular transport?

Back

Concentration gradients drive the movement of substances; molecules move from areas of high concentration to low concentration in passive transport.