Cell Membrane and Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane acts as a barrier that regulates what enters and exits the cell, maintaining homeostasis.

Front

Define diffusion.

Back

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.

Front

What are phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.

Front

What is isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting substances across a cell membrane with the help of channel or carrier proteins.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell engulfs large particles or liquids by enclosing them in a vesicle.

Front

What is exocytosis?

Back

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