Chapter 7.3/7.4 Review

Front

What is an isotonic solution?

Back

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

Front

What is the function of the cell membrane?

Back

The cell membrane acts as a 'gatekeeper', controlling what enters and exits the cell.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is active transport?

Back

The movement of substances across a cell membrane against the concentration gradient, requiring energy (ATP).

Front

What part of a phospholipid is hydrophobic?

Back

The 'tails' or fatty acids are hydrophobic, meaning they repel water.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances along the concentration gradient, while active transport requires energy to move substances against the gradient.

Front

What is a hypotonic solution?

Back

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

Front

What is a hypertonic solution?

Back

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

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.