Cell Membrane and Cell Transport

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

Which part of the phospholipid is hydrophobic?

Back

The tails.

Front

What happens to a cell in a hypertonic solution?

Back

The cell would shrink.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

In an isotonic solution, which way will the water flow?

Back

It will flow both ways at equal rates.

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against the concentration gradient, requiring energy.

Front

What is one major difference between passive and active transport?

Back

Active transport uses energy; passive transport does not.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to lose water.