Membrane Transport Review

Front

What happens to a red blood cell in a hypertonic solution?

Back

Water from the red blood cell will move into the solution, causing the cell to shrink.

Front

Define endocytosis.

Back

Endocytosis is a type of active transport that moves particles into a cell by enclosing them in a vesicle made from the plasma membrane.

Front

What is the difference between active transport and facilitated diffusion?

Back

Active transport requires energy to move substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances down their concentration gradient.

Front

What is bulk transport?

Back

Bulk transport is the movement of large particles or large quantities of smaller particles across the cell membrane using energy.

Front

What is a phospholipid?

Back

A phospholipid is a type of lipid molecule that is a major component of cell membranes, consisting of a hydrophilic 'head' and two hydrophobic 'tails'.

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 role of transport proteins in the cell membrane?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either by passive or active transport.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of particles.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the plasma membrane.

Front

What is the significance of the plasma membrane's fluid mosaic model?

Back

The fluid mosaic model describes the structure of the plasma membrane as a mosaic of various proteins that float in or on the fluid lipid bilayer, allowing for flexibility and movement.