Cell Transport

Front

What is the function of the cell membrane in maintaining homeostasis?

Back

The cell membrane controls what substances may enter or leave cells, thus helping to maintain homeostasis.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one that causes a cell to swell due to a lower concentration of solutes outside the cell compared to the inside.

Front

Define concentration gradient.

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What type of cellular transport is represented by the process of exocytosis?

Back

Exocytosis is a type of cellular transport that involves the expulsion of materials from a cell.

Front

What does it mean for a cell membrane to be selectively permeable?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others.

Front

What is the role of transport proteins in cell membranes?

Back

Transport proteins facilitate the movement of substances across the cell membrane.

Front

What is osmosis?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell will lose water and shrink due to a higher concentration of solutes outside the cell.

Front

Explain 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 facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.