Front

What happens to a cell in a hypertonic solution?

Back

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

Front

What is the direction of movement for substances in active transport?

Back

Substances move from low to high concentration, against their concentration gradient.

Front

What is the role of proteins in facilitated diffusion?

Back

Proteins help move molecules across the cell membrane down their concentration gradient without using energy.

Front

Define isotonic solution.

Back

An isotonic solution has the same solute concentration inside and outside the cell, resulting in no net movement of water.

Front

What is osmosis?

Back

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

Front

What is 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 gradient.

Front

What is a phospholipid?

Back

A phospholipid is a molecule that makes up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's fluidity and structure.

Front

What is the process of endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment.