Cell Transport Test Review

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient, requiring energy.

Front

What does it mean to move substances against the concentration gradient?

Back

It means moving substances from an area of low concentration to an area of high concentration.

Front

What is endocytosis?

Back

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

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.

Front

What is osmosis?

Back

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

Front

What is a phospholipid?

Back

A phospholipid is a type of lipid molecule that is a major component of cell membranes, consisting of a hydrophilic 'head' and two hydrophobic 'tails'.

Front

What does isotonic mean?

Back

Isotonic refers to a solution where the concentration of solutes is the same on both sides of a membrane, resulting in no net movement of water.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing water to move out of the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing water to move into the cell.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins facilitate the movement of specific substances across a cell membrane, often through active transport.