Biology - Cells and Cell Transport

Front

What is the phospholipid bilayer?

Back

A double layer of phospholipids that makes up the cell membrane, allowing selective permeability for certain substances.

Front

Which substances can pass through the phospholipid bilayer without assistance?

Back

Small, nonpolar molecules like O2 and CO2 can pass through freely.

Front

What is diffusion?

Back

The movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is a hypertonic solution?

Back

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

Front

What is a hypotonic solution?

Back

A solution with a lower concentration of solutes compared to the inside of the cell, causing the cell to gain water.

Front

What is an isotonic solution?

Back

A solution with the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What is the function of the nucleus?

Back

The nucleus stores genetic material (DNA) and controls cell activities.

Front

What is the role of mitochondria?

Back

Mitochondria are the powerhouse of the cell, generating ATP through cellular respiration.

Front

What is the function of ribosomes?

Back

Ribosomes are responsible for protein synthesis in the cell.