AICE Biology Cell Membrane Review

Front

What are glycoproteins?

Back

Glycoproteins are special proteins that have oligosaccharides attached to them, important for cell-to-cell recognition and adhesion.

Front

What happens to the SA:V ratio as cells increase in size?

Back

As cells increase in size, the surface area to volume (SA:V) ratio decreases.

Front

Which particles can diffuse across the phospholipid bilayer?

Back

Oxygen and carbon dioxide can diffuse across the phospholipid bilayer.

Front

What occurs when a person with swollen gums rinses with salt water?

Back

The water in the gums moves out due to the high concentration of salt in the solution.

Front

What process allows the movement of large molecules into a cell?

Back

Endocytosis allows the movement of molecules that are too large to enter through a cell surface membrane.

Front

Define the term 'phospholipid bilayer'.

Back

The phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier to most water-soluble substances.

Front

What is the role of integral proteins in the cell membrane?

Back

Integral proteins span the entire membrane and are involved in transporting substances across the membrane.

Front

Explain facilitated diffusion.

Back

Facilitated diffusion is the process by which molecules pass through the cell membrane via protein channels without the use of energy.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy.