Bio Unit 2-Cell Membrane and Transport

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water enters the cell, causing it to swell and potentially burst due to the increased internal pressure.

Front

What is osmosis?

Back

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

Front

What role do glycolipids and glycoproteins play in the cell membrane?

Back

Glycolipids and glycoproteins act as the cell's identification and communication system, helping cells recognize each other and interact.

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 molecules from high to low concentration.

Front

What occurs during active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (usually in the form of ATP) to move substances from low to high concentration.

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 and resulting in cell shrinkage.

Front

Define isotonic solution.

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses membrane proteins to help move substances across the cell membrane without energy.

Front

What is the function of membrane proteins?

Back

Membrane proteins assist in transporting substances across the cell membrane, act as enzymes, and play a role in cell signaling.