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 is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, moving from high to low concentration.

Front

What is active transport?

Back

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

Front

What is homeostasis?

Back

Homeostasis is the process by which a cell maintains a stable internal environment despite changes in external conditions.

Front

What happens to a cell in a hypertonic solution?

Back

The cell would shrink due to water moving out of the cell.

Front

What happens to a cell in a hypotonic solution?

Back

The cell would expand and possibly burst due to water moving into the cell.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of particles from high to low concentration, while osmosis specifically refers to the movement of water across a semipermeable membrane.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane allows certain molecules or ions to pass through while blocking others.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.